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.TH hdiff 1 "28 May 2016" "" ""
.SH NAME
hdiff \- compares two HDF files and reports the differences
.SH SYNOPSIS
'nh
.fi
.ad l
\fBhdiff\fR \kx
.if (\nx>(\n(.l/2)) .nr x (\n(.l/5)
'in \n(.iu+\nxu
[\fB-V\fR] [\fB-b\fR] [\fB-g\fR] [\fB-s\fR] [\fB-d\fR] [\fB-D\fR] [\fB-S\fR] [\fB-v\fR \fIvar1[,...]\fR] [\fB-u\fR \fIvar1[,...]\fR] [\fB-e\fR \fIcount\fR] [\fB-t\fR \fIlimit\fR] [\fB-p\fR \fIrelative\fR] file1 file2 
'in \n(.iu-\nxu
.ad b
'hy
.SH DESCRIPTION
\fBhdiff\fR compares two HDF files and reports the
differences.
.SH OPTIONS
.TP 
\*(T<\fB\-V\fR\*(T>
Display version of the HDF4 library and exit
.TP 
\*(T<\fB\-b\fR\*(T>
Verbose mode
.TP 
\*(T<\fB\-g\fR\*(T>
Compare global attributes only
.TP 
\*(T<\fB\-s\fR\*(T>
Compare SD local attributes only
.TP 
\*(T<\fB\-d\fR\*(T>
Compare SD data only
.TP 
\*(T<\fB\-D\fR\*(T>
Compare Vdata data only
.TP 
\*(T<\fB\-S\fR\*(T>
Print statistics
.TP 
\*(T<\fB\-v\fR\*(T> \fIvar1[,...]\fR
Compare SD data on variable(s) \fIvar1\fR,...
only
.TP 
\*(T<\fB\-u\fR\*(T> \fIvar1[,...]\fR
Compare vdata on variable(s) \fIvar1\fR,... only
.TP 
\*(T<\fB\-e\fR\*(T> \fIcount\fR
Print difference up to count number for each variable
.TP 
\*(T<\fB\-t\fR\*(T> \fIlimit\fR
Print difference when it is greater than limit
.TP 
\*(T<\fB\-p\fR\*(T> \fIrelative\fR
Print difference when it is greater than a relative limit
.TP 
\*(T<\fIfile1\fR\*(T>
File name of the first HDF file
.TP 
\*(T<\fIfile2\fR\*(T>
File name of the second HDF file
.PP
The '\fIcount\fR' value must be a positive integer
.PP
The '\fIlimit\fR'
and '\fIrelative\fR'
values must be positive numbers
.PP
The \*(T<\fB\-t\fR\*(T> compare criteria is |a - b| > limit
.PP
The \*(T<\fB\-p\fR\*(T> compare criteria is |(b-a)/a| > relative
.PP
Return codes: 0 (no differences found), 1 (differences found)