AFNI Jewel Box AKA Tool Box, Treasure Chest or Miscellaneous Tools
AFNI Jewel Box AKA Tool Box, Treasure Chest or Miscellaneous Tools
AFNI Jewel Box AKA Tool Box, Treasure Chest or Miscellaneous Tools
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-6-o 3dcalc (continued)Example: make right and left hemisphere masks from with alignedvolumes3dautomask -prefix M epi+<strong>or</strong>ig3dcalc -a M+<strong>or</strong>ig -dicom -expr 'ispositive(x-3.5)' -prefix Mright3dcalc -a M+<strong>or</strong>ig -dicom -expr 'isnegative(x-3.5)' -prefix MleftExample: temp<strong>or</strong>al median smoothing3dcalc -a fred+<strong>or</strong>ig -b 'a[0,0,0,1]' -c 'a[0,0,0,-1]'-expr 'median(a,b,c)'Example: create dataset following a 2D cosine periodic functioncentered around the center of each slice3dcalc -prefix cos0.4 -a 256blank+<strong>or</strong>ig. -expr 'cos(PI* 0.4 * sqrt( (x * x)+ (y * y)) )'
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