Re: [R] cube root of a negative number

2010-10-26 Thread Prof Brian Ripley
In this particular case it is part of the C99 stanadrd (7.12.7.4) for the 'pow' function R uses. On Wed, 27 Oct 2010, Berwin A Turlach wrote: G'day Gregory, On Tue, 26 Oct 2010 19:05:03 -0400 Gregory Ryslik wrote: Hi, This might be me missing something painfully obvious but why does the cu

[R] [R-pkgs] Introducing the futile.paradigm, a package for functional dispatching in R

2010-10-26 Thread Nurometic R Help
Hello useRs, I'm pleased to announce the general availability of the R package futile.paradigm, which is a language extension that implements functional dispatching in R. This is an alternative to the current object-oriented styles, replacing them with a functional programming style that provides

Re: [R] installing ONLY the documentation files (Rd) for many packages?

2010-10-26 Thread Prof Brian Ripley
On Tue, 26 Oct 2010, Kjetil Halvorsen wrote: I have been searching the documentation for some time nmow, but cannot find it. It must be possible to download packages (many), but only install the help system? I am not sure what you actally want: R CMD INSTALL does not install the Rd files --

Re: [R] Zoom in in a plot

2010-10-26 Thread Alaios
Actually I want to see how close are some point to a line segment so I want to use some zoom lenses and zoom in and out into different parts of the plot and see how some places look like. Best Regards From: Greg Snow Sent: Tue, October 26, 2010 6:47:32 P

Re: [R] clinical data analysis

2010-10-26 Thread Remko Duursma
?prop.test -- View this message in context: http://r.789695.n4.nabble.com/clinical-data-analysis-tp3014811p3014856.html Sent from the R help mailing list archive at Nabble.com. __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo

Re: [R] writing a table

2010-10-26 Thread Remko Duursma
This probably fixes it, although an example would be nice : write.csv(dfr, row.names=FALSE) you change the names with the ?names function before writing it to a csv file. remko -- View this message in context: http://r.789695.n4.nabble.com/writing-a-table-tp3014821p3014839.html Sent from the

[R] trouble with histograms

2010-10-26 Thread Marcel Curlin
Hi, I have tab-delimited data with an unequal number of entries per column, of the sort: A B C 1 2 2 3 4 1 5 2 2 6 2 5 2 3 6 2 I would like to make a histogram of the frequencies of each represented number in a "stacked" histogram, where you can see the contribution of eac

[R] writing a table

2010-10-26 Thread lord12
When ever I write a table of columns to a csv file the columns are offset by one column and do not match the column headers. How do I align my columns with the column headers? Also, how do I change the name of my column headers. -- View this message in context: http://r.789695.n4.nabble.com/wri

[R] GAM function in mgcv package

2010-10-26 Thread Lorenzo Cattarino
Hi R-users I am trying to use the GAM function of the mgcv package. But I am having problem trying to specify the k parameter. Although I managed to run some models by giving to the parameter some (random) value, and it is explained by Wood (2006) that it does not seem to "really" affect th

[R] clinical data analysis

2010-10-26 Thread guoya li
I have two sets of data national wide: total patient number=500,000, 8400 died, mortality rate=1.7% Hospital1: total patient number=230, 6 died, mortality rate=2.6%   Is the mortality rate of hospital1 different from mortality rate of nationl wide?   Which function or package should I use to solve

Re: [R] Data.frame Vs Matrix Vs Array: Definitions Please

2010-10-26 Thread Gabor Grothendieck
On Tue, Oct 26, 2010 at 8:37 PM, Matt Curcio wrote: > Hi All, > I am learning R and having a little trouble with the usage and proper > definitions of data.frames vs. matrix vs vectors. I have read many R > tutorials, and looked over ump-teen 'cheat' sheets and have found that > no one has articul

Re: [R] cube root of a negative number

2010-10-26 Thread Berwin A Turlach
G'day Bill, On Wed, 27 Oct 2010 10:34:27 +1100 wrote: [...] > It is no surprise that this does not work when working in the real > domain, except "by fluke" with something like > > > -4^(1/3) > [1] -1.587401 > > > > where the precedence of the operators is not what you might expect. > Now th

[R] Data.frame Vs Matrix Vs Array: Definitions Please

2010-10-26 Thread Matt Curcio
Hi All, I am learning R and having a little trouble with the usage and proper definitions of data.frames vs. matrix vs vectors. I have read many R tutorials, and looked over ump-teen 'cheat' sheets and have found that no one has articulated a really good definition of the differences between 'data.

Re: [R] cube root of a negative number

2010-10-26 Thread Jeff Newmiller
Because it is implemented as antilog((1/3)*log(-4)) most likely using base 2 for the log/antilog functions. "Gregory Ryslik" wrote: >Hi, > >This might be me missing something painfully obvious but why does the >cube root of the following produce an NaN? > >> (-4)^(1/3) >[1] NaN >> > >As we ca

Re: [R] cube root of a negative number

2010-10-26 Thread Spencer Graves
install.packages('sos')# if you don't have it already library(sos) rs <- ???roots # 216 matches summary(rs) # in 106 packages rs # opens a web browser with all 216 matched in a table # listing the package with the most matches first. # This included roots{signal}, which referenced polyroot{base},

Re: [R] cube root of a negative number

2010-10-26 Thread Berwin A Turlach
G'day Gregory, On Tue, 26 Oct 2010 19:05:03 -0400 Gregory Ryslik wrote: > Hi, > > This might be me missing something painfully obvious but why does the > cube root of the following produce an NaN? > > > (-4)^(1/3) > [1] NaN 1/3 is not exactly representable as a binary number. My guess is tha

[R] installing ONLY the documentation files (Rd) for many packages?

2010-10-26 Thread Kjetil Halvorsen
I have been searching the documentation for some time nmow, but cannot find it. It must be possible to download packages (many), but only install the help system? How? Kjetil __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-

Re: [R] Cut including the 0 value as separate bin

2010-10-26 Thread Henrique Dallazuanna
Try this: cut(DF$A, c(-Inf, 0, 4, 8, 12, 14, 16, 20)) On Tue, Oct 26, 2010 at 7:01 PM, LCOG1 wrote: > > Hi everyone, > > I have been using R too long to have to ask this but here i am. How do i > create a separate bin for the 0 value? So for: > > #Create data frame > DF<-data.frame(A=0:20)

Re: [R] Formatting durations

2010-10-26 Thread Gabor Grothendieck
On Tue, Oct 26, 2010 at 7:17 PM, Gabor Grothendieck wrote: > On Tue, Oct 26, 2010 at 3:28 PM, Susanta Mohapatra > wrote: >> Hi, >> >> I am working with a dataset for sometime and I need some help in parsing >> some data. >> >> There is a column called "Duration" which has data like following: >>

Re: [R] cube root of a negative number

2010-10-26 Thread Bill.Venables
To take it one step further: > x <- as.complex(-4) > cx <- x^(1/3) > > r <- complex(modulus = Mod(cx), argument = Arg(cx)*c(1,3,5)) > r [1] 0.793701+1.37473i -1.587401+0.0i 0.793701-1.37473i > r^3 [1] -4+0i -4+0i -4+0i > So when you ask for "the" cube root of -4, R has a choice of three p

Re: [R] cube root of a negative number

2010-10-26 Thread sachinthaka . abeywardana
hmm interesting. When I did -4^(1/3) got the correct answer, but then again that's because it processes the negative later. i.e. -4^(1/2) gave me -2 instead of the 2i I expected. Also when I did (-4+0i)^(1/3) it gave me 0.793701+1.37473i. Possible bug? Sachin --- Please consider the environment b

Re: [R] Formatting durations

2010-10-26 Thread Gabor Grothendieck
On Tue, Oct 26, 2010 at 3:28 PM, Susanta Mohapatra wrote: > Hi, > > I am working with a dataset for sometime and I need some help in parsing > some data. > > There is a column called "Duration" which has data like following: > > 2 minutes => 120 > 2 min => 120 > 10 seconds =>10 > 2 hrs =>7200 >  2

Re: [R] cube root of a negative number

2010-10-26 Thread Kjetil Halvorsen
Look at this: > x <- as.complex(-4) > x [1] -4+0i > x^(1/3) [1] 0.793701+1.37473i > (-4)^(1/3) [1] NaN It seems that R gives you the principal root, which is complex, and not the real root. Kjetil On Tue, Oct 26, 2010 at 8:05 PM, Gregory Ryslik wrote: > Hi, > > This might be me missing somethi

Re: [R] LaTeX output with mlogit or multinom

2010-10-26 Thread Achim Zeileis
On Tue, 26 Oct 2010, Marc Schwartz wrote: On Oct 26, 2010, at 2:59 PM, Ben Hunter wrote: Hi everyone, Why am I having such a tough time finding a way to put an mlogit summary table into latex? Everywhere I read says that using Sweave and latex is the most sophisticated, dynamic way to get out

[R] cube root of a negative number

2010-10-26 Thread Gregory Ryslik
Hi, This might be me missing something painfully obvious but why does the cube root of the following produce an NaN? > (-4)^(1/3) [1] NaN > As we can see: > (-1.587401)^3 [1] -4 Thanks! Greg __ R-help@r-project.org mailing list https://stat.ethz.c

Re: [R] Which version control system to learn for managing R projects?

2010-10-26 Thread Hadley Wickham
> 1. What is everyone else using?  The network effect is important since > you want people to be able to access your repository and you want to > leverage your knowledge of the version control system for other > projects' repositories.  To that extent Subversion is the clear choice > since its used

Re: [R] to determine the variable importance in svm

2010-10-26 Thread Max Kuhn
> The caret package has answers to all your questions. >> 1) How to obtain a variable (attribute) importance using >> e1071:SVM (or other >> svm methods)? I haven't implemented a model-specific method for variables importance for SVM models. I know of one package (svmpath) that will return the re

Re: [R] Which version control system to learn for managing R projects?

2010-10-26 Thread Gabor Grothendieck
On Tue, Oct 26, 2010 at 12:16 PM, Tal Galili wrote: > Hello all, > > I wish to learn a version control system for managing my R (data analysis) > projects. > > I know of SVN and github, and wonder if there is any reason for which I > should prefer the one over the other (or any other platform). An

Re: [R] discerning plot dots using colors

2010-10-26 Thread Peter Langfelder
On Tue, Oct 26, 2010 at 3:13 PM, Daisy Englert Duursma wrote: > There are several ways to do this but the package ggplot2 > > library(ggplot2) > qplot(displ,hwy,data=mpg,colour=factor(cyl)) > > That can of course be done also using the standard plot command (substitute variable names as necessar

Re: [R] discerning plot dots using colors

2010-10-26 Thread Daisy Englert Duursma
There are several ways to do this but the package ggplot2 library(ggplot2) qplot(displ,hwy,data=mpg,colour=factor(cyl)) On Wed, Oct 27, 2010 at 9:06 AM, elaine kuo wrote: > Dear List, > > > > I am using the command plot to present the relationship > > between bird richness (Y axis) and elevatio

Re: [R] LaTeX output with mlogit or multinom

2010-10-26 Thread Marc Schwartz
On Oct 26, 2010, at 2:59 PM, Ben Hunter wrote: > Hi everyone, > > Why am I having such a tough time finding a way to put an mlogit summary > table into latex? Everywhere I read says that using Sweave and latex is the > most sophisticated, dynamic way to get output, but it appears very limited > i

[R] discerning plot dots using colors

2010-10-26 Thread elaine kuo
Dear List, I am using the command plot to present the relationship between bird richness (Y axis) and elevation (X axis). However, I would like to observe the distributions of bird richness in different administrative areas (A, B, C, …., G) in this plot. For example, the dots in area A mig

Re: [R] calculate area between intersecting polygons

2010-10-26 Thread Remko Duursma
I don't know why I forgot that you can do this as well : area.poly(intersect(p1,p2)) ... a bit more straightforward. greetings, Remko -- View this message in context: http://r.789695.n4.nabble.com/calculate-area-between-intersecting-polygons-tp3012980p3014581.html Sent from the R help mailin

Re: [R] see code of plot.survfit

2010-10-26 Thread Brian Diggs
On 10/26/2010 2:33 PM, Bond, Stephen wrote: How can I expose the code behind plot.survfit?? Uwe Ligges. R Help Desk: Accessing the sources. R News, 6(4):43-45, October 2006. http://cran.r-project.org/doc/Rnews/ Thanks a lot. Stephen B [[alternative HTML version deleted]] --

Re: [R] see code of plot.survfit

2010-10-26 Thread Ben Bolker
Bond, Stephen cibc.com> writes: > > How can I expose the code behind plot.survfit?? library(survival) survival:::plot.survfit __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://w

Re: [R] Dispersion ( Plot error bars ) help

2010-10-26 Thread Ben Bolker
Peter Francis me.com> writes: > > Dear List, > > I am looking to plot error bars on a line using dispersion. > > I have values for the upper value and for the lower values, however > i am unsure how to plot different values > for the upper CI and the lower CI? > > I have been using > > disp

Re: [R] lme vs. lmer results

2010-10-26 Thread Dimitri Liakhovitski
Thanks a lot, Douglas. It's very heplful. A clarification question about specifying the model in lmer. You said it should be: mix.lmer <- lmer(DV ~a+b+c+d+(e+f+g+h+ii|group), mydata) I assume it was a typo and you meant that the last predictor in brackets should be i (rather than ii), right? Als

Re: [R] About the recursion in R

2010-10-26 Thread Duncan Murdoch
On 26/10/2010 5:17 PM, Xiuquan Wang wrote: Hi, I am now using R to implement a stepwise algrithom which includes a recursion function. e.g: a = 1 *f_recursion* = function(id) { b = a + id; #: row A if (...){ a = a +1;* f_recursion*(b) } #: row B

[R] see code of plot.survfit

2010-10-26 Thread Bond, Stephen
How can I expose the code behind plot.survfit?? Thanks a lot. Stephen B [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-proje

[R] About the recursion in R

2010-10-26 Thread Xiuquan Wang
Hi, I am now using R to implement a stepwise algrithom which includes a recursion function. e.g: a = 1 *f_recursion* = function(id) { b = a + id; #: row A if (...){ a = a +1;* f_recursion*(b) } #: row B else{ } } --

[R] Formatting durations

2010-10-26 Thread Susanta Mohapatra
Hi, I am working with a dataset for sometime and I need some help in parsing some data. There is a column called "Duration" which has data like following: 2 minutes => 120 2 min => 120 10 seconds =>10 2 hrs =>7200 2-3 minutes => 150 or 120 5 minutes (when i arrived => 300 Flyby approx 20 sec. =

Re: [R] runtime on ising model

2010-10-26 Thread Mike Marchywka
> Date: Tue, 26 Oct 2010 12:53:14 -0400 > From: mike...@gmail.com > To: j...@bitwrit.com.au > CC: r-help@r-project.org > Subject: Re: [R] runtime on ising model > > I have an update on where the issue is coming from. > > I commented out the code for "

[R] Cut including the 0 value as separate bin

2010-10-26 Thread LCOG1
Hi everyone, I have been using R too long to have to ask this but here i am. How do i create a separate bin for the 0 value? So for: #Create data frame DF<-data.frame(A=0:20) #Create label vector labs<-1:6 #Create buckets and label DF$Cut<-cut(DF$A,c(0,4,8,12,14,16,20),labels=labs,include.l

Re: [R] divide column in a dataframe based on a character

2010-10-26 Thread Brian Diggs
On 10/25/2010 8:56 PM, Daisy Englert Duursma wrote: Hello, If I have a dataframe: example(data.frame) zz<-c("aa_bb","bb_cc","cc_dd","dd_ee","ee_ff","ff_gg","gg_hh","ii_jj","jj_kk","kk_ll") ddd<- cbind(dd, group = zz) and I want to divide the column named group by the "_", how would I do this?

Re: [R] anomalies with the loess() function

2010-10-26 Thread Peter Ehlers
On 2010-10-26 11:48, Jonathan P Daily wrote: ?loess use this instead: fit<- loess(b~a) lines(a, predict(fit)) I don't think that will work when there are incomplete cases, in which case 'a' and predict(fit) may not correspond. I think that it's always best to define a set of predictor values

Re: [R] ncdf4 package installation in R

2010-10-26 Thread shaticus
Thanks David! After setting the LD_LIBRARY_PATH variable(to /usr/local/lib) R was able to successfully install the ncdf4 package. On Tue, Oct 26, 2010 at 2:24 PM, David Pierce [via R] < ml-node+3014258-455613790-200...@n4.nabble.com > wrote: > shaticus wrote: > > > > > Hello all, > > > > I coul

[R] LaTeX output with mlogit or multinom

2010-10-26 Thread Ben Hunter
Hi everyone, Why am I having such a tough time finding a way to put an mlogit summary table into latex? Everywhere I read says that using Sweave and latex is the most sophisticated, dynamic way to get output, but it appears very limited in this respect. I'm just starting out with Sweave and LaTeX

Re: [R] lme vs. lmer results

2010-10-26 Thread Douglas Bates
On Tue, Oct 26, 2010 at 12:27 PM, Dimitri Liakhovitski wrote: > Hello, > and sorry for asking a question without the data - hope it can still > be answered: > I've run two things on the same data: > # Using lme: > mix.lme <- lme(DV ~a+b+c+d+e+f+h+i, random = random = ~ e+f+h+i| > group, data = m

[R] sbrier in ipred

2010-10-26 Thread Haesook Kim
Hello I am trying to use sbrier in ipred but got an error message (see below). Can someone help? --- I. function() { library(ipred) library(survival) set.seed(12345) age <- rnorm(30, 50, 10) stime <- rexp(30) cens <- runif(30,.5,2) sevent <- as.numeric(stime <= cens) stime <- pmin(stime,

[R] specify strata in survfit

2010-10-26 Thread Bond, Stephen
Is it possible to get survfit to produce the survival line for a single strata like preddow <- survfit(modall,newdata=newdat,se.fit=F,strata=2) # the strata argument is being ignored in the call above Or even get a more economical/faster calculation of the hazard directly from the coxph object

Re: [R] Forcing results from lm into datframe

2010-10-26 Thread Hadley Wickham
On Tue, Oct 26, 2010 at 11:55 AM, Dennis Murphy wrote: > Hi: > > When it comes to split, apply, combine, think plyr. > > library(plyr) > ldply(split(afvtprelvefs, afvtprelvefs$basestudy), >         function(x) coef(lm (ef ~ quartile, data=x, weights=1/ef_std))) Or do it in two steps: models <- d

Re: [R] Cox Proportional Models and Haplotypes

2010-10-26 Thread David Winsemius
On Oct 26, 2010, at 8:57 AM, sr500 wrote: Hello, I was wondering if anyone knew of a function that fits haplotype data into a cox proportional hazard model. I have computed my Haplotype frequencies using the haplo.stats package. I have also been using the haplo.glm function but this is

Re: [R] anomalies with the loess() function

2010-10-26 Thread Jonathan P Daily
?loess use this instead: fit <- loess(b~a) lines(a, predict(fit)) -- Jonathan P. Daily Technician - USGS Leetown Science Center 11649 Leetown Road Kearneysville WV, 25430 (304) 724-4480 "Is the room still a room when its empty? Does the room, the thing itself

Re: [R] superscript characters in title with '+'

2010-10-26 Thread David Winsemius
On Oct 26, 2010, at 11:15 AM, Gavin Simpson wrote: On Fri, 2010-10-22 at 15:39 +0200, Claudia Beleites wrote: On 10/22/2010 03:15 PM, DrCJones wrote: Being a chemist, it seemed natural to me to put the i after the concentration brackets into a subscript - though you didn't say you want

Re: [R] Which version control system to learn for managing R projects?

2010-10-26 Thread Hadley Wickham
> git is where the world is headed.  This video is a little old: > http://www.youtube.com/watch?v=4XpnKHJAok8, but does a good job > getting the point across. And lots of R users are using github already: http://github.com/languages/R/created Hadley -- Assistant Professor / Dobelman Family Juni

Re: [R] Forcing results from lm into datframe

2010-10-26 Thread Dennis Murphy
Hi: When it comes to split, apply, combine, think plyr. library(plyr) ldply(split(afvtprelvefs, afvtprelvefs$basestudy), function(x) coef(lm (ef ~ quartile, data=x, weights=1/ef_std))) .id (Intercept) quartile 1 CBP090802020.92140 3.38546887 2 CBP090802129.31632 0.013

Re: [R] runtime on ising model

2010-10-26 Thread Michael D
I have an update on where the issue is coming from. I commented out the code for "pos[k+1] <- M[i,j]" and the if statement for time = 10^4, 10^5, 10^6, 10^7 and the storage and everything ran fast(er). Next I added back in the "pos" statements and still runtimes were good (around 20 minutes). So

[R] Cox Proportional Models and Haplotypes

2010-10-26 Thread sr500
Hello, I was wondering if anyone knew of a function that fits haplotype data into a cox proportional hazard model. I have computed my Haplotype frequencies using the haplo.stats package. I have also been using the haplo.glm function but this is a linear regression and is not quite what I am look

[R] anomalies with the loess() function

2010-10-26 Thread Federico Bonofiglio
Hello Masters, I run the loess() function to obtain local weighted regressions, given lowess() can't handle NAs, but I don't improve significantly my situation.., actually loess() performance leave me much puzzled I attach my easy experiment below #--SCRIPT---

[R] "chfactor.c", line 130 ERROR

2010-10-26 Thread Matevž Pavlič
Hi all, I have a problem with this code... as it generates an error in R. z<-predict(dat.fit, newdata=grd) I saw a post on R forum about this ["chfactor.c", line 130: singular matrix in function LDLfactor() ] error and tried pretty much anything I could read about it and still hav

Re: [R] (no subject)

2010-10-26 Thread Gavin Simpson
On Fri, 2010-10-22 at 05:54 -0700, Penny Adversario wrote: > I am doing cluster analysis on 8768 respondents on 5 lifestyle > variables and am having difficulty constructing a dissimilarity matrix > which I will use for PAM. I always get an error: “cannot allocate > vector of size 293.3 Mb” even

Re: [R] ncdf4 package installation in R

2010-10-26 Thread David Pierce
shaticus wrote: > > Hello all, > > I could use some help installing the ncdf4 package in R (under CentOS > 5.4). >... > When I issue an 'install.packages(c('ncdf4')) in R, compilation succeeds > but > I receive the following error during the loading phase of installation: > > ** building package in

Re: [R] superscript characters in title with '+'

2010-10-26 Thread Gavin Simpson
On Fri, 2010-10-22 at 15:39 +0200, Claudia Beleites wrote: > On 10/22/2010 03:15 PM, DrCJones wrote: > > Being a chemist, it seemed natural to me to put the i after the concentration > brackets into a subscript - though you didn't say you want that. > > A more "correct" expression would be: >

[R] ncdf4 package installation in R

2010-10-26 Thread shaticus
Hello all, I could use some help installing the ncdf4 package in R (under CentOS 5.4). I've installed R-2.12.0, zlib-1.2.5, hdf5-1.8.4-patch1 and NetCDF4.1.1 from source. Make check reports all tests have passed for all of these programs. When I issue an 'install.packages(c('ncdf4')) in R, comp

Re: [R] Forcing results from lm into datframe

2010-10-26 Thread Henrique Dallazuanna
Try this: sapply(by(x, x$basestudy, lm, formula = ef ~ quartile), coef) On Tue, Oct 26, 2010 at 1:08 PM, Small Sandy (NHS Greater Glasgow & Clyde) < sandy.sm...@nhs.net> wrote: > Hi > > I need some help getting results from multiple linear models into a > dataframe. > Let me explain the problem.

Re: [R] Which version control system to learn for managing R projects?

2010-10-26 Thread Whit Armstrong
Marc is exactly right about people having strong opinions. R-forge is really the _only_ reason to consider using svn. git is where the world is headed. This video is a little old: http://www.youtube.com/watch?v=4XpnKHJAok8, but does a good job getting the point across. Hg is a good alternative,

Re: [R] Forcing results from lm into datframe

2010-10-26 Thread David Winsemius
On Oct 26, 2010, at 10:22 AM, Small Sandy (NHS Greater Glasgow & Clyde) wrote: Thanks David That's great As a matter of interest, to get a data frame by studies why do you have to do fitsdf <- as.data.frame(t(as.data.frame(fits))) The apply family of functions often return results rot

Re: [R] Setting constraints in the glm package

2010-10-26 Thread David Winsemius
On Oct 26, 2010, at 9:27 AM, David Smith wrote: Many thanks for the help. You could express your thanks by including context the next time you present a follow-up (as requested in the Posting Guide). Only a minority of readers view this list on Nabble, so we don't see the web delivered

[R] lme vs. lmer results

2010-10-26 Thread Dimitri Liakhovitski
Hello, and sorry for asking a question without the data - hope it can still be answered: I've run two things on the same data: # Using lme: mix.lme <- lme(DV ~a+b+c+d+e+f+h+i, random = random = ~ e+f+h+i| group, data = mydata) # Using lmer mix.lmer <- lmer(DV ~a+b+c+d+(1|group)+(e|group)+(f|grou

Re: [R] Forcing results from lm into datframe

2010-10-26 Thread Small Sandy (NHS Greater Glasgow & Clyde)
Thanks David That's great As a matter of interest, to get a data frame by studies why do you have to do fitsdf <- as.data.frame(t(as.data.frame(fits))) Why doesn't fitsdf <- as.data.frame(t(fits)) work? Sandy Small From: David Winsemius [dwinsem...@comc

Re: [R] Which version control system to learn for managing R projects?

2010-10-26 Thread Marc Schwartz
On Oct 26, 2010, at 11:22 AM, Duncan Murdoch wrote: > On 26/10/2010 12:16 PM, Tal Galili wrote: >> Hello all, >> >> I wish to learn a version control system for managing my R (data analysis) >> projects. >> >> I know of SVN and github, and wonder if there is any reason for which I >> should pref

Re: [R] Chron object in time series plot

2010-10-26 Thread Gabor Grothendieck
On Tue, Oct 26, 2010 at 12:56 PM, Manta wrote: > > Thanks for your help Gabor. That would be exactly what I am looking for. If I > use your code I get the nice representation I am looking for. However, when > I try to apply the code in the same fashion to my case, it does not produce > the x-axis.

Re: [R] Chron object in time series plot

2010-10-26 Thread Manta
Thanks for your help Gabor. That would be exactly what I am looking for. If I use your code I get the nice representation I am looking for. However, when I try to apply the code in the same fashion to my case, it does not produce the x-axis. I believe the problem hinges on the following warning me

Re: [R] to determine the variable importance in svm

2010-10-26 Thread Liaw, Andy
The caret package has answers to all your questions. > -Original Message- > From: r-help-boun...@r-project.org > [mailto:r-help-boun...@r-project.org] On Behalf Of Neeti > Sent: Tuesday, October 26, 2010 10:42 AM > To: r-help@r-project.org > Subject: [R] to determine the variable importa

Re: [R] Zoom in in a plot

2010-10-26 Thread Greg Snow
For a quick exploration of the plot you can use the zoomplot function in the TeachingDemos package. But for production graphs it is better to explicitly set the xlim and ylim parameters in creating the plot up front. -- Gregory (Greg) L. Snow Ph.D. Statistical Data Center Intermountain Healthc

Re: [R] Setting constraints in the glm package

2010-10-26 Thread Ravi Varadhan
We can further generalize this: Suppose we want to constrain parameters such that : b2 = a * b1 b3 = a * b1 We can do the following: fit.a <- glm( y ~ I(x1 + a* x2 + a * x3), data= , ... ) For a fixed value of `a', we compute the log-likelihood of `fit.a'. This is the profile likeli

Re: [R] mixed effects regression with weights using lme (lme4)

2010-10-26 Thread Dimitri Liakhovitski
Thanks a lot - it's very helpful. On Tue, Oct 26, 2010 at 11:37 AM, Ista Zahn wrote: > Hi Dimitri, > The lme function is not in the lme4 package, so there is some > confusion there. But you can use weights with the lmer function in > lme4. ?lmer tells you that weights are specified the same way

Re: [R] Setting constraints in the glm package

2010-10-26 Thread David Smith
Many thanks for the help. I assumed that I would need to account for the variables in the model, even though I wish to assign a zero coefficient to them. I've looked at the offset function, but does this not just assign the value 1 to the variables? How would I specify a zero coefficient to more

Re: [R] Conditional looping over a set of variables in R

2010-10-26 Thread Peter Ehlers
I would still recommend vector_of_column_number <- apply(yourdata, 1, match, x=1) as the simplest way if you only want the number of the column that has the first 1 or "1" (the call works as is for both numeric and character data). Rows which have no 1s will return a value of NA. Anything wron

Re: [R] Which version control system to learn for managing R projects?

2010-10-26 Thread Duncan Murdoch
On 26/10/2010 12:16 PM, Tal Galili wrote: Hello all, I wish to learn a version control system for managing my R (data analysis) projects. I know of SVN and github, and wonder if there is any reason for which I should prefer the one over the other (or any other platform). An example for a reason

Re: [R] Zoom in in a plot

2010-10-26 Thread Duncan Murdoch
On 26/10/2010 11:30 AM, Alaios wrote: in a simple plot. When i do plot is it possible to zoom in or out or this is not possible at all? There's no general support for that, but you could conceivably write it yourself using getGraphicsEvent. The example code there adjusts xlim and ylim accord

[R] Which version control system to learn for managing R projects?

2010-10-26 Thread Tal Galili
Hello all, I wish to learn a version control system for managing my R (data analysis) projects. I know of SVN and github, and wonder if there is any reason for which I should prefer the one over the other (or any other platform). An example for a reason could be if it will make it easier for me t

Re: [R] stripping #s in a text file prior to reading into table or dataframe

2010-10-26 Thread Henrique Dallazuanna
Try this: read.table('don.5.clusters.txt', header = TRUE, comment.char = '', quote = '') On Tue, Oct 26, 2010 at 1:15 PM, Donald Braman wrote: > That's one of the things I tried, but which didn't work. I get the > following > error when I do that: > > Error in read.table(file = "don.5.clusters.

Re: [R] Zoom in in a plot

2010-10-26 Thread Joshua Wiley
On Tue, Oct 26, 2010 at 8:38 AM, Jonathan P Daily wrote: > I think that this would be possible if you save the graph to a scalable > format. This is true to an extent. I have not checked on postscript or xfig, but at least for PDF, even though you can "zoom"/blow the picture up, you still have f

Re: [R] Zoom in in a plot

2010-10-26 Thread David Winsemius
On Oct 26, 2010, at 8:30 AM, Alaios wrote: in a simple plot. When i do plot is it possible to zoom in or out or this is not possible at all? Zoom? Do you mean restrict the region plotted to specific ranges? xlim and ylim arguments provide that facility. -- David. Best Regards Alex

Re: [R] mixed effects regression with weights using lme (lme4)

2010-10-26 Thread Ista Zahn
Hi Dimitri, The lme function is not in the lme4 package, so there is some confusion there. But you can use weights with the lmer function in lme4. ?lmer tells you that weights are specified the same way as in the lm function, and refers you to ?lm for details. HTH, Ista On Tue, Oct 26, 2010 at 11

Re: [R] Zoom in in a plot

2010-10-26 Thread Jonathan P Daily
I think that this would be possible if you save the graph to a scalable format. Try looking into: ?postscript ?xfig ?pdf -- Jonathan P. Daily Technician - USGS Leetown Science Center 11649 Leetown Road Kearneysville WV, 25430 (304) 724-4480 "Is the room still a

Re: [R] Zoom in in a plot

2010-10-26 Thread Joshua Wiley
Hi Alex, After you have created the plot I do not know of a way to zoom (in base graphics), but you can always use the xlim and ylim arguments to focus on a particular area (or effectively zoom) when you are create the plot. For instance, plot(x = 1:10, y = 1:10) plot(x = 1:10, y = 1:10, xlim

Re: [R] Forcing results from lm into datframe

2010-10-26 Thread David Winsemius
On Oct 26, 2010, at 8:08 AM, Small Sandy (NHS Greater Glasgow & Clyde) wrote: Hi I need some help getting results from multiple linear models into a dataframe. Let me explain the problem. I have a dataframe with ejection fraction results measured over a number of quartiles and grouped

[R] Zoom in in a plot

2010-10-26 Thread Alaios
in a simple plot. When i do plot is it possible to zoom in or out or this is not possible at all? Best Regards Alex [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-hel

[R] mixed effects regression with weights using lme (lme4)

2010-10-26 Thread Dimitri Liakhovitski
Hello! I am sorry if it's a naive/wrong question. But can one run a regression with weights using lme? Thank you! -- Dimitri Liakhovitski Ninah Consulting www.ninah.com __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help

Re: [R] Setting constraints in the glm package

2010-10-26 Thread David Winsemius
On Oct 26, 2010, at 7:50 AM, Viechtbauer Wolfgang (STAT) wrote: The constraint b1=b2 in a model such as b0 + b1 x1 + b2 x2 + b3 x3 implies that b0 + b1 (x1 + x2) + b3 x3, so just add x1 and x2 (call this x12) and fit the model b0 + b1 x12 + b3 x3 and you have imposed the constraint that b1

Re: [R] stripping #s in a text file prior to reading into table or dataframe

2010-10-26 Thread Donald Braman
That's one of the things I tried, but which didn't work. I get the following error when I do that: Error in read.table(file = "don.5.clusters.txt", header = TRUE, comment.char = "", : more columns than column names If I remove the hashes by other means, I don't get that error. On Tue, Oct 26

Re: [R] Reading in a tab delimitated file

2010-10-26 Thread Jonathan P Daily
Right, I forgot to mention to use header = T. -- Jonathan P. Daily Technician - USGS Leetown Science Center 11649 Leetown Road Kearneysville WV, 25430 (304) 724-4480 "Is the room still a room when its empty? Does the room, the thing itself have purpose? Or do we

[R] Forcing results from lm into datframe

2010-10-26 Thread Small Sandy (NHS Greater Glasgow & Clyde)
Hi I need some help getting results from multiple linear models into a dataframe. Let me explain the problem. I have a dataframe with ejection fraction results measured over a number of quartiles and grouped by base_study. My dataframe (800 different base_studies) looks like > afvtprelvefs base

Re: [R] Reading in a tab delimitated file

2010-10-26 Thread Henrique Dallazuanna
Try this: Lines <- "SampleIDDisease E-CBIL-28-raw-cel-1435145228.cel1 E-CBIL-28-raw-cel-1435145451.cel2 E-CBIL-28-raw-cel-1435145479.cel2 E-CBIL-28-raw-cel-1435145132.cel3 E-CBIL-28-raw-cel-1435145417.cel3 E-CBIL-28-raw-cel-1435145301.cel2 E-

Re: [R] Reading in a tab delimitated file

2010-10-26 Thread amindlessbrain
"A call to read.table(..., sep = "", ...) reads in any length of whitespace as the delimiter. On your sample text it read in a 2 column dataframe. " Thanks! That works for the file, but when I enter in my next line of code it doesn't work. I'm not sure if this is the problem, or if the next line

Re: [R] Reading in a tab delimitated file

2010-10-26 Thread amindlessbrain
If I try that I get this: Error in scan(file, what = "", sep = sep, quote = quote, nlines = 1, quiet = TRUE, : invalid 'sep' value: must be one byte ? -- View this message in context: http://r.789695.n4.nabble.com/Reading-in-a-tab-delimitated-file-tp3013620p3013771.html Sent from the R he

[R] Multiple, multiple regressions...

2010-10-26 Thread Duncan, Adam
Caveats and disclaimers: I am quite happy to undertake self-teaching if directed to a relevant prior posting and welcome such direction. I have programming and statistical training/experience which I would characterize as Masters level. Thank you for reading and replying to this post. It is very

[R] Calculating confidence intervals on subset of bootstrap sample statistics

2010-10-26 Thread Abiel X Reinhart
I have a vector of monthly log asset price returns. I would like use the boot package to sample one-year returns, and then calculate confidence intervals on the loss distribution only. More concretely, I would like to say something like "99% of LOSSES (not RETURNS) are above cutoff X." If the v

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