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hdiff [-V] [-b] [-g] [-s] [-d] [-D] [-S] [-v var1[,...]] [-u var1[,...]] [-e count] [-t limit] [-p relative] file1 file2
[-V] Display version of the HDF4 library and exit
[-b] Verbose mode
[-g] Compare global attributes only
[-s] Compare SD local attributes only
[-d] Compare SD data only
[-D] Compare Vdata data only
[-S] Print statistics
[-v var1[,...]] Compare SD data on variable(s) <var1>,... only
[-u var1[,...]] Compare vdata on variable(s) <var1>,... only
[-e count] Print difference up to count number for each variable
[-t limit] Print difference when it is greater than limit
[-p relative] Print difference when it is greater than a relative limit
file1 File name of the first HDF file
file2 File name of the second HDF file
The 'count' value must be a positive integer
The 'limit' and 'relative' values must be positive numbers
The -t compare criteria is |a - b| > limit
The -p compare criteria is |(b-a)/a| > relative
Return codes: 0 (no differences found), 1 (differences found)
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