Hi, I am getting different results using 3dmerge vs. 3dclust, whereby 3dmerge is finding no clusters, whereas 3dclust is (see below). Am I making a errot somewhere?
Liat

3dmerge -prefix xxxxx -1thresh 2.879 -1clust_order 5 -22 Trait_FC_T_Test_FSeed_Nacc_stats_pi_final_Z+tlrc.

Program 3dmerge
++ 3dmerge: AFNI version=AFNI_2008_07_18_1710 (Jul 24 2008) [32-bit]
3dmerge: edit and combine 3D datasets, by RW Cox
++ default -1dindex = 0
++ default -1tindex = 1
++ editing input dataset in memory (1.3 MB)
*** NO CLUSTERS FOUND ***
.
USING 3dclust (from new clusterize GUI)
------------------

3dclust -1dindex 0 -1tindex 1 -2thresh -2.879 2.879 5 594 Trait_FC_T_Test_FSeed_Nacc_stats_pi_final_Z+
tlrc.
++ 3dclust: AFNI version=AFNI_2008_07_18_1710 (Jul 24 2008) [32-bit]
++ Authored by: RW Cox et al
#
#Cluster report for file Trait_FC_T_Test_FSeed_Nacc_stats_pi_final_Z+tlrc.
#[Connectivity radius = 5.00 mm Volume threshold = 594.00 ]
#[Single voxel volume = 27.0 (microliters) ]
#[Voxel datum type = short ]
#[Voxel dimensions = 3.000 mm X 3.000 mm X 3.000 mm ]
#[Coordinates Order = RAI ]
#Mean and SEM based on Absolute Value of voxel intensities:
#
#Volume CM RL CM AP CM IS minRL maxRL minAP maxAP minIS maxIS Mean SEM Max Int MI RL MI AP MI IS
#------ ----- ----- ----- ----- ----- ----- ----- ----- ----- ------- ------- ------- ----- ----- -----
2511 29.4 84.0 -4.0 16.5 58.5 82.5 88.5 -15.5 11.5 4.1e-04 3.0e-05 -0.0015 25.5 82.5 -9.5
972 -0.2 -34.7 0.9 -7.5 4.5 -40.5 -25.5 -6.5 5.5 0.0042 7.2e-05 -0.0049 -1.5 -34.5 -3.5
#------ ----- ----- ----- ----- ----- ----- ----- ----- ----- ------- ------- ------- ----- ----- -----
# 3483 5.8 -10.7 -0.1