Thanks Sarah, All,
I guess I never thought of a negative sign as an "operation", but
knowing that it is considered an operation explains everything nicely.
Somewhere in it's underbelly, I suppose -4 is represented as "0 - 4"?
Either way, I'm glad it is consistent & accurate, so that I didn't
Hi Everyone,
I did a search through the archives and did not find an answer,
although I must admit it is a hard search to do ( ^0.5 is tough to
explicitly search for ).
I am sure there is some mathematically accurate reason to explain the
following, but I guess I either never learned it o
t familiar with numPy so I do not know how it handles new
> classes, but with some tweaks to my workflow, I do not find myself
> running into problems with how R handles them. I definitely
> appreciate your position because I have been there...as I became more
> familiar with R, classe
Hi All,
I don't have a "I need help" question, so much as a query into any
update whether 'R' has made any progress with some of the core functions
retaining classes. As an example, because it's one of the cases that most
egregiously impacts me & my work and keeps pushing me away from 'R' and
argument if you need to restore the timezone.
>
>
> On Wed, 5 Oct 2011, jim holtman wrote:
>
> Here is what I use:
>>
>> unix2POSIXct(1317857320)
>> [1] "2011-10-05 19:28:40 EDT"
>>
>>
>> unix2POSIXct <- function (time) structure
Hi,
In short, I would like to know if there is any way to convert a numeric
into a date, similar to how strptime() can convert a string to a date time
class?
There are some functions, etc. which don't work well with dates, and
tend to force them into numerics. I understand that the numbe
Thanks Duncan, Martin,
You both provided exactly what I needed!
Regards,
Mike
---
XKCD <http://www.xkcd.com>
On Mon, Aug 8, 2011 at 5:21 PM, Duncan Murdoch wrote:
> On 08/08/2011 8:04 PM, Mike Williamson wrote:
>
>> H
Hi All,
I have tried to find an answer within documentation, but I cannot:
o How can call a class "slot" without knowing the name a priori?
E.g., let's say I use the "pcaMethods" library to create a "pcaRes"
object. How can I call parts of that object without using the specific
names of
gt;>
> [1] "2010-12-14 20:25:40 PST" "2010-12-10 08:15:20 PST"
> [3] "2010-10-05 05:12:10 PDT"
>
> That is, just force the class back to POSIXct, don't use as.POSIXct.
>
> Hope this helps.
>- Phil Spector
>
Hello,
This is mostly to developers, but in case I missed something in my
literature search, I am sending this to the broader audience.
- Are there any plans in the works to make "time" classes a bit more
friendly to the rest of the "R" world? I am not suggesting to allow for
fancy
ic score, Minard's Napoleanic war:
The most exciting frontier is charting what's already here."
-- xkcd
--
Help protect Wikipedia. Donate now:
http://wikimediafoundation.org/wiki/Support_Wikipedia/en
On Wed, Jan 12, 2011 at 6:08 PM, Brian Diggs wrote:
> On 1/12/2011 2:46 PM, M
Hello,
A hopefully simple question. I use 'R' through emacs, but I suspect the
following would occur with any manner of text editor:
- my editor has a normally quite handy feature where it will
automatically indent to the appropriate level when I start a new line.
However, this occa
Hello all,
First of all, thanks so those of you who helped me a week or so ago
managing a time series with varying gaps between the data series in 'R'.
(My final preferred solution was to use "its" function & then
forecast(Arima( ) ). )
My next question is a general statistical question
Hi All,
First let me state that I did search for a while on r-help, google, and
using the "sos" package inside of 'R', without much luck. I want to know
how to create a univariate time series from a set of data that will have
huge time gaps in it. For instance, here is a snapshot of a piece
?
>
> #!/bin/bash
> myTest=$(Rscript testing.R.r)
> echo "myTest contains"
> echo $myTest
>
> Note that testing.R.r will have to cat() or print() myResult (e.g, my
> testing.R.r contains
>
> myResult <- paste("Hello World")
> cat(myResult)
>
&g
Hey everyone,
I know that I can call 'R' from other scripts, and that I can make
command calls from 'R' (e.g., using system() ). But how can I get 'R' to
RETURN values to the script that called it. E.g., I would like to be able
to do something like the following (as a simpler example) from a
rd's Napoleanic war:
The most exciting frontier is charting what's already here."
-- xkcd
--
Help protect Wikipedia. Donate now:
http://wikimediafoundation.org/wiki/Support_Wikipedia/en
On Sat, Oct 2, 2010 at 6:31 AM, Marc Schwartz wrote:
> On Oct 1, 2010, at 6:26 PM, Mike Wil
Hello all,
I have a strange / interesting problem that might be 'R' settings
themselves, or it might be something with the OS.
I am using the RODBC library. I have a script that goes out and, before
making a query for a big data set, will first query for the column names of
the data set.
Hello All,
Using the standard "summary" function in 'R', I ran across some odd
behavior that I cannot understand. Easy to reproduce:
Typing:
summary(c(6,207936))
Yields::
Min. *1st Qu. MedianMean 3rd Qu.Max.*
6 *51990 104000 104000 156000 207900*
None of t
Hey everyone,
I don't have a question. Instead some helpful advice with things I've
learned from trying to connect 'R' to databases using RODBC.
ROBDC is a very handy tool that, once you have everything fixed up
nicely, is a great way to have scripts run fairly autonomously, safe in the
Hello all,
I have a peculiar and particular bug that I stumbled across with
ggplot2. I cannot seem to replicate it with anything other than my specific
data set.
Here is the problem:
- when I try to plot a histogram, allowing for ggplot2 to decide the
binwidths itself, I get the f
Hi everyone,
I have another "Random Forest" package question:
- my (presumably incorrect) understanding of the varImpPlot is that it
should plot the "% increase in MSE" and "IncNodePurity" exactly as can be
found from the "importance" section of the model results.
- However, th
.default(x[!missing])
> } else if (is.factor(x)) {
>freq <- table(x)
>x[missing] <- names(freq)[which.max(freq)]
> } else {
>stop("na.roughfix only works for numeric or factor")
> }
> x
> }
>
> I'm cheating a bit because as.data.fram
gt; system.time(x.fixed <- na.roughfix(x))
>user system elapsed
>8.440.398.85
> R 2.11.1, randomForest 4.5-35, Windows XP (32-bit), Thinkpad T61 with 2GB
> ram.
>
> Andy
>
> --
> *From:* Mike Williamson [mailto:this.is..
gt; randomForest(myroughfixed[list.of.predictor.columns],
> myroughfixed[[myresponse]],...)
>
> HTH,
> Andy
>
> -Original Message-
> From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org]
> On Behalf Of Mike Williamson
> Sent: Wednesday, June 30,
Hi all,
I am using the package "random forest" for random forest predictions. I
like the package. However, I have fairly large data sets, and it can often
take *hours* just to go through the "na.roughfix" call, which simply goes
through and cleans up any NA values to either the median (numer
rontier is charting what's already here."
-- xkcd
--
Help protect Wikipedia. Donate now:
http://wikimediafoundation.org/wiki/Support_Wikipedia/en
On Thu, Jun 24, 2010 at 10:29 AM, Peter Langfelder <
peter.langfel...@gmail.com> wrote:
> On Thu, Jun 24, 2010 at 10:16 AM, Mike Williams
Hey everyone,
I've been using 'R' long enough that I should have some idea of what the
heck either expression() or eval() are really ever useful for. I come
across another instance where I WISH they would be useful, but I cannot get
them to work.
Here is the crux of what I would like
All,
I am having trouble with a "read.table()" function that is inside of
another function. But if I call the function by itself, it works fine.
Moreover, if I run the script on a Mac OS X (with the default Mac OS X
version of R installed, rev 2.8), it works fine. But it does not work if I
r
I am creating a CDF plot function more user-friendly than any default r
function. Depending upon the bimodality of the data (it is often bimodal),
or any other strange data trends, the points can end up gathering in just
about any corner of the plot. So, when I add a legend, whether I choose
.
Regardless, with it shown in 2 locations, clearly I was off my rocker...
Mike
On Mon, Jan 5, 2009 at 5:08 PM, Deepayan Sarkar
wrote:
> On Mon, Jan 5, 2009 at 4:57 PM, Mike Williamson
> wrote:
> > Greg, others,
> >
> >Thanks for the info! I sus
t;
> Hope this helps,
>
> --
> Gregory (Greg) L. Snow Ph.D.
> Statistical Data Center
> Intermountain Healthcare
> greg.s...@imail.org
> 801.408.8111
>
>
> > -Original Message-
> > From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-
>
gards,
Mike
On Sat, Jan 3, 2009 at 8:36 AM, jim holtman wrote:
> W.R.T. multiple pages, the HELP page says to use a filename like this:
>
> png(filename = "Rplot%03d.png",
>
> where %03d is an incremented value for each page.
>
> On Fri, Jan 2, 2009
Hello all and thanks in advance for any help,
There are really two issues that I am having, both related to saving
graphs:
1) It seems that the "dev...()" functions are unstable when using higher
level graphs (specifically I was using levelplot)
2) I have a large grid of levelplot graphs that
> On Mon, Dec 15, 2008 at 9:48 PM, Mike Williamson wrote:
>
>>I want to make some simple CDF (cumulative distribution function) plots
>> to check whether distributions are Gaussian / normal.
>
>
> qqnorm()
>
>
>>As long as I am asking: I also want to pl
the same
graph, where each factor has it's own cdf line. Any ideas for this?
THanks in advance!
Mike Williamson
[[alternative HTML version deleted]]
__
R-help@r-project.or
All,
Apologies if this was already answered... I couldn't find an answer that
specifically addressed Mac OS instead of either windows or linux. I use
"aquamacs emacs" as my text editor. It is essentially Xemacs with a GUI
that looks closer to standard Mac GUIs, as far as I can tell. I insta
37 matches
Mail list logo
