Hi Rick and Daniel,

Thanks for the tips.
I obliqued the ana, the example_func & zstat do match ana_ob well.
But the orientation of zstat & example_fun is RPI, whereas the ana_ob is RAI.
Shall I 3dresample the ana_ob to match the orientation of zstat & example_fun?

-------zstat---------

jackie% 3dinfo zstat8.nii ++ 3dinfo: AFNI version=AFNI_2007_05_29_1644 (Aug 21 2007) [32-bit]
qform not present, sform used.
sform was not exact, and the worst axis is
12.299994 degrees from plumb.

Dataset File: zstat8.nii
Identifier Code: NII_6YHXZqPklPp5Uo8LTZDswg Creation Date: Thu Oct 11 13:38:00 2007
Dataset Type: Func-Bucket (-fbuc)
Byte Order: MSB_FIRST {assumed} [this CPU native = LSB_FIRST]
Storage Mode: NIFTI file
Data Axes Orientation:
first (x) = Right-to-Left
second (y) = Posterior-to-Anterior
third (z) = Inferior-to-Superior [-orient RPI]
R-to-L extent: -128.000 [R] -to- 124.000 [L] -step- 4.000 mm [ 64 voxels]
A-to-P extent: -149.843 [A] -to- 102.157 [P] -step- 4.000 mm [ 64 voxels]
I-to-S extent: -52.120 -to- 62.880 [S] -step- 4.600 mm [ 26 voxels]
Number of values stored at each pixel = 1
-- At sub-brick #0 '?' datum type is float
statcode = fizt


--------ana_ob--------
jackie% 3dinfo anat_ob1+orig.HEAD
++ 3dinfo: AFNI version=AFNI_2007_05_29_1644 (Aug 21 2007) [32-bit]

Dataset File: anat_ob1+orig
Identifier Code: XYZ_rhWv00dCrmBH0DUROsnwpg Creation Date: Thu Oct 11 12:56:26 2007
Dataset Type: Anat Bucket (-abuc)
Byte Order: LSB_FIRST [this CPU native = LSB_FIRST]
Storage Mode: BRIK file
Data Axes Orientation:
first (x) = Right-to-Left
second (y) = Anterior-to-Posterior
third (z) = Inferior-to-Superior [-orient RAI]
R-to-L extent: -92.223 [R] -to- 82.777 [L] -step- 1.000 mm [176 voxels]
A-to-P extent: -159.840 [A] -to- 113.160 [P] -step- 1.000 mm [274 voxels]
I-to-S extent: -173.436 -to- 123.564 [S] -step- 1.000 mm [298 voxels]
Number of values stored at each pixel = 1
-- At sub-brick #0 '#0' datum type is short: 0 to 1143

----- HISTORY -----
[jackie@MPIB7193-R-52c.local: Thu Oct 11 12:56:28 2007] 3dWarp -oblique_parent example_func.nii -prefix anat_ob1 ana1.nii