Hi.
I have used 3dmerge to create clusters and cluster orders (see below). When I view the cluster orders everything looks good. But, the view of activation clusters (1clust results) after selecting the corresponding F-value on the slide bar (e.g., 2.632), the results are not identical to those of cluster orders (1clust_order). Why would this be?
Darren

set myradius = 7
set myvolume = 663

set myRxNgPsF = 2.632
set myGrpF = 4.89
set myRxNgPsxGF = 2.632

3dmerge \
-1thresh ${myGrpF}\
-1clust ${myradius} ${myvolume}\
-1dindex 2\
-1tindex 3\
-prefix ${myprefix}GrpF${myGrpF}R${myradius}V${myvolume}\
${mybucket}+tlrc

3dmerge \
-1thresh ${myGrpF}\
-1clust_order ${myradius} ${myvolume}\
-1dindex 2\
-1tindex 3\
-prefix ${myprefix}GrpOrdF${myGrpF}R${myradius}V${myvolume}\
${mybucket}+tlrc

# Masking Datsets

3dcalc -a ${myfuncmask}+tlrc\
-b ${myprefix}GrpF${myGrpF}R${myradius}V${myvolume}+tlrc\
-expr "a*b" \
-prefix ${mascprefix}GrpF${myGrpF}R${myradius}V${myvolume}masc

3dcalc -a ${myfuncmask}+tlrc\
-b ${myprefix}GrpOrdF${myGrpF}R${myradius}V${myvolume}+tlrc\
-expr "a*b" \
-prefix ${mascprefix}GrpOrdF${myGrpF}R${myradius}V${myvolume}masc

# After masking I put everything together.

3dbucket -prefix ${genprefix}R${myradius}V${myvolume}masc+tlrc \
-fbuc ${mascprefix}GrpF${myGrpF}R${myradius}V${myvolume}masc+tlrc \
-fbuc ${mascprefix}GrpOrdF${myGrpF}R${myradius}V${myvolume}masc+tlrc \
-fbuc ${mybucket}+tlrc'[3]' \

3drefit \
-sublabel 0 Grp \
-sublabel 1 GrpOrd \
${genprefix}R${myradius}V${myvolume}masc+tlrc