/usr/share/freemat/help/text/ishandle.mdc is in freemat-help 4.0-5.
This file is owned by root:root, with mode 0o644.
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1 2 3 4 5 6 7 8 9 10 11 12 | ISHANDLE ISHANDLE Test for Graphics Handle
Usage
Given a constant, this routine will test to see if the
constant is a valid graphics handle or not. The syntax
for its use is
y = ishandle(h,type)
and returns a logical 1 if x is a handle of type type
and a logical 0 if not.
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