:orphan: .. _ahelp_3dMax: ***** 3dMax ***** .. contents:: :local: | .. code-block:: none Usage: 3dBrickStat [options] dataset Compute maximum and/or minimum voxel values of an input dataset The output is a number to the console. The input dataset may use a sub-brick selection list, as in program 3dcalc. Note that this program computes ONE number as the output; e.g., the mean over all voxels and time points. If you want (say) the mean over all voxels but for each time point individually, see program 3dmaskave. Note: If you don't specify one sub-brick, the parameter you get ----- back is computed from all the sub-bricks in dataset. Options : -quick = get the information from the header only (default) -slow = read the whole dataset to find the min and max values all other options except min and max imply slow -min = print the minimum value in dataset -max = print the maximum value in dataset (default) -mean = print the mean value in dataset -sum = print the sum of values in the dataset -var = print the variance in the dataset -stdev = print the standard deviation in the dataset -stdev and -var are mutually exclusive -count = print the number of voxels included -volume = print the volume of voxels included in microliters -positive = include only positive voxel values -negative = include only negative voxel values -zero = include only zero voxel values -non-positive = include only voxel values 0 or negative -non-negative = include only voxel values 0 or greater -non-zero = include only voxel values not equal to 0 -absolute = use absolute value of voxel values for all calculations can be combined with restrictive non-positive, non-negative, etc. even if not practical. Ignored for percentile and median computations. -nan = include only voxel values that are not numbers (e.g., NaN or inf). This is basically meant for counting bad numbers in a dataset. -nan forces -slow mode. -nonan = exclude voxel values that are not numbers (exclude any NaN or inf values from computations). -mask dset = use dset as mask to include/exclude voxels -mrange MIN MAX = Only accept values between MIN and MAX (inclusive) from the mask. Default it to accept all non-zero voxels. -mvalue VAL = Only accept values equal to VAL from the mask. -automask = automatically compute mask for dataset Can not be combined with -mask -percentile p0 ps p1 write the percentile values starting at p0% and ending at p1% at a step of ps% Output is of the form p% value p% value ... Percentile values are output first. Only one sub-brick is accepted as input with this option. Write the author if you REALLY need this option to work with multiple sub-bricks. -perclist NUM_PERC PERC1 PERC2 ... Like -percentile, but output the given percentiles, rather than a list on an evenly spaced grid using 'ps'. -median a shortcut for -percentile 50 1 50 (or -perclist 1 50) -perc_quiet = only print percentile results, not input percentile cutoffs -ver = print author and version info -help = print this help screen INPUT DATASET NAMES ------------------- This program accepts datasets that are modified on input according to the following schemes: 'r1+orig[3..5]' {sub-brick selector} 'r1+orig<100..200>' {sub-range selector} 'r1+orig[3..5]<100..200>' {both selectors} '3dcalc( -a r1+orig -b r2+orig -expr 0.5*(a+b) )' {calculation} For the gruesome details, see the output of 'afni -help'. ++ Compile date = Oct 13 2022 {AFNI_22.3.03:linux_ubuntu_16_64}