Hello,

I've found the cluster program  very useful for my analysis though I have
some questions regarding it's usage. First of all is there any  more
available information on this program's use except from the basic info  when
typing cluster in the command line ?

According to previous posts the cluster table can give the locus of the
maximally activated voxels if fed in with the raw tstat image into the
cluster. So setting up the command as : cluster
--in=fslvbm_clustere_corrp_tstat1.nii.gz --thresh=0.95 --oindex=clusterindex
--olmax=clustermax.txt --cope=fslvbm_tstat1.nii.gz --osize=clustersize >
clustertable.txt  can report local maxima. 
What exactly --cope= option does? It's only mentioned in the usage that is
the name of the input cope volume. What this cope mean?

I've noticed that even without feeding the raw tstat image (cluster
--in=fslvbm_clustere_corrp_tstat1.nii.gz --thresh=0.95 --oindex=clusterindex
--olmax=clustermax.txt --osize=clustersize > clustertable.txt) the
clustermax.txt file creates local maxima which are the same as the ones
created when feeding with the raw t-stat image. Is this normal?

In addition  in the clustertable.txt  for every cluster there's a  Z-max 
value (p-value in my case) for every cluster with it's corresponding
coordinates. What this Z-max value stands
for? What is it's difference with the information in the clustermax.txt
file?  Clustermax.txt file contains by default the top 10 (if they exist)
local maxima (p-values ) for each cluster right? 

And finally I also wanted to ask a question regarding the COG of the
clusters. Sometimes ( when calculating the COG of a cluster in order to
locate it's activation center ) due to the cluster's shape the COG can be
located totally outside/far from the cluster. Is it appropriate  to report
the activation center of a cluster giving coordinates that lie far from the
cluster itself?If not which is a good way to report the activation center of
such clusters?Is there an fsl utility that copes with this?

Thank you again 
Antonios-Konstantinos






Cluster Index	Z	x	y	z	
3	0.999	54	54	45
3	0.999	49	48	36
3	0.999	51	47	36
3	0.999	51	49	35
3	0.999	48	55	34
3	0.999	48	53	34
2	0.998	30	41	27
2	0.998	31	52	26
2	0.998	33	42	26
2	0.998	28	64	23
2	0.998	33	46	22
2	0.998	31	49	21
1	0.961	50	67	39
1	0.961	57	69	37
1	0.961	50	67	33
1	0.961	60	71	32
1	0.961	59	74	30
1	0.961	42	67	29





Cluster Index	Voxels	Z-MAX	Z-MAX X (vox)	Z-MAX Y (vox)	Z-MAX Z (vox)	Z-COG X (vox)	Z-COG Y (vox)	Z-COG Z (vox)	COPE-MAX	COPE-MAX X (vox)	COPE-MAX Y (vox)	COPE-MAX Z (vox)	COPE-MEAN
3	1735	0.999	60	59	16	56.2	55.9	29.3	6.23	54	63	25	3.67
2	1278	0.998	32	58	14	32.4	55.2	25.4	5.3	36	64	25	3.56
1	309	0.962	42	67	29	51.9	69.8	35.4	4.31	61	75	31	3.33