[R] Friedman test with replicated samples

2005-11-16 Thread Alessandro Bigi
Dear R-users,
I would need to do a Friedman test with replicated samples, and 
Friedman.test(y...) currently works only for unreplicated designs.
Is there a script or a function available?
Thanks,

Alessandro


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[R] how to export density_function output?

2005-11-07 Thread Alessandro Bigi
Dear all,

quite a naive question: I have a data frame and I computed the kernel 
density estimate with density on each column.
Now I'd like to export in a txt file the density function output for each 
column, but, when if I use write.table, I get a message Error in 
as.data.frame.default(x[[i]], optional = TRUE) : can't coerce class 
density into a data.frame
How should I do?
Thanks,

Alessandro


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[R] weird results w/ prcomp-princomp

2005-04-08 Thread Alessandro Bigi
I am doing a Principal Component Analaysis (PCA) on a 44x19 matrix.
with
 princomp(x,cor=TRUE,scores=TRUE)
and
 prcomp(x,scale=TRUE,center=TRUE)
The resulted eigenv. and rotated matrix are the same (as expected), however 
the sum of eigenvalues is lower than 19 (number of variables).

With a commercial stat software it worked correctly, with the same dataset.
Am I doing something wrong?
Thanks
Alex

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