Re: [R] R vs. RStudio?

2015-01-13 Thread Vokey, John
Although it doesn’t prevent me from using RStudio, there is a bug in the pdf rendering from the graphics window that mangles the display of graph legends using base graphics (i.e., when save as pdf is chosen). The same does not happen when the same graphing code is used with the standard R IDE.

[R] Using PBMROC software in R

2014-12-14 Thread Vokey, John
Fellow useRs, I am trying to install and call the PBMROC software (from the Metz-ROC Software Downloads: http://metz-roc.uchicago.edu) without much success, even though it was designed to be flexible enough to call from R or Matlab. Has anyone managed to get the PBMROC software to work within

[R] left transpose

2013-10-21 Thread Vokey, John
useRs, I frequently require the following transform of a matrix that I call a leftTranspose: -- transposes x such that the last items of each row become -- the first items in each column. E.g., -- a b c d -- e f g h -- becomes: -- d h -- c g -- b f -- a e because i

Re: [R] Book recomendation: Repeated Measurements

2013-07-15 Thread Vokey, John
On 2013-07-15, at 4:00 AM, r-help-requ...@r-project.org wrote: > On 7/14/2013 3:05 PM, Rolf Turner wrote: >> On 15/07/13 08:57, Spencer Graves wrote: >> >> >>> >>> You may know that "mixed effects" is another term for "repeated >>> measurements". >> >> >> >> I must of course preface t

Re: [R] prcomp: results with reversed sign in output?

2011-09-10 Thread Vokey, John
In addition, many PCA packages follow the convention that if the majority of weights are negative for that component, reverse the sign. On 2011-09-10, at 4:00 AM, r-help-requ...@r-project.org wrote: > The point is that a principal component vector is a solution, > say V, of a matrix equation A%*

Re: [R] bootstrap resampling - simplified

2011-03-02 Thread Vokey, John
On 2011-03-02, at 4:00 AM, r-help-requ...@r-project.org wrote: > Hello there, > > I have a problem concerning bootstrapping in R - especially focusing on the > resampling part of it. I try to sum it up in a simplified way so that I would > not confuse anybody. > > I have a small database consi

Re: [R] Help with ANOVA in R

2010-03-10 Thread Vokey, John
> > Your line of code: > > zzz.aov <- aov(Intensity ~ Group + Error(Sample), data = zzzanova) > > indicates that you are trying to do a repeated measures ANOVA, not just an > ANOVA. The Error(Sample) term in your expression indicates that Sample is a > within subjects factor, which I presume is