Displaying 4 results from an estimated 4 matches for "tkellermann".
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kellermann
2007 Jan 12
1
Within-subject factors in lme
Dear R-users
I'm considering a repeated measures experiment where two
within-subject factors A (2 levels) and B (3 levels) have been
measured for each of 14 subjects, S. I wish to test the effect of
factor A. I know that a variance component model with random effects
S, S:A, S:B and S:A:B can be fitted using aov:
aov( y ~ A*B + Error(S/(A*B)) )
If there is no significant interaction, the
2007 Jan 16
2
Gaussian glm for grouped data with unequal variances
Hello - I am fairly new to R, (i.e., ability to create functions/write
programs insignificant) and was wondering if there might be a convenient way
to model the following: I want to fit a gaussian glm to grouped data, while
allowing for unequal variances in each of the groups.
More specifically, my data set looks something like this:
----------------
data group
1 76 1
2 82 1
3
2006 Jul 24
5
change the name of file
Dear R Users,
Is it possible to make file names dependent on a changing variable?
For instance. I generate random numbers in a loop and at each iteration I
want data to write to file (I do not want to write everything in one file
using 'append'):
for (i in 1:50){
x<-matrix(runif(100, min=0,max=1),nrow=5,ncol=20)
Write(t(x),file="Data_i.txt",ncolumns=5,sep="\t")
}
2006 Sep 22
3
extract data from lm object and then use again?
Hi list,
I want to write a general function so that it would take an lm object,
extract its data element, then use the data at another R function (eg, glm).
I searched R-help list, and found this would do the trick of the first part:
a.lm$call$data
this would return a name object but could not be recognized as a
data.frameby glm. I also tried
call(as.character(a.lm$call$data))
or