Dear list:

 

I am analyzing functional data using FSFAST. I have 7 conditions in a blocked design and I would like to run an F-test using the following contrast matrix:

  [ -0.5000         0    0.5000         0   -0.5000    0.5000         0;

         0   -1.0000         0    1.0000         0         0         0]

 

For this I am manually creating a matlab file with the contrast matrix in the “mystudy” folder. (Is there a way of having FSFAST create the matrix for me using mkanalysis-sess ?)

I am attaching the matlab m-file with the matrix, which contains this matrix as the ContrastMtx_0 variable. In the matlab file, I set sumconds to 0.

I am unsure as what to waht the  WCond matrix should be in the matlab file. I am making it equal to the ContrastMtx_0, but this might be wrong.

 

Afterwards I run the analysis using selxavg3-sess, from matlab using (“rois” is the name of the analysis):

unix([FS_HOME '/fsfast/bin/selxavg3-sess -analysis rois -sf sf -df df -float -overwrite -monly tmp_gen_rois.m']); tmp_gen_rois;

 

Within text output, I get the following:

Computing contrast matrices

 …(some stuff regarding other contrast matrices)…

 3 main_faces J= 3  eff = 287636151.3   vrf = 862908453.9536 vrfffx = 852078020.3613 r = 1.01

 

This last line says that for main_faces J=3, but my contrast matrix has 2 rows (I understand J is the number of lines in the matrix)! Could someone point out what I am doing wrong here?

 

Thank you very much

 

Pablo