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<TITLE>Frequently asked questions about Octave (with answers): MATLAB compatibility</TITLE>
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<H1> 10. Porting programs from MATLAB to Octave </H1>
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<A NAME="IDX53"></A>
<A NAME="IDX54"></A>
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<P>
"I wrote some code for MATLAB, and I want to get it running under
Octave. Is there anything I should watch out for?"
</P>
<P>
The differences between Octave and MATLAB typically fall into one of
three categories:
</P>
<P>
<OL>
<LI>
Irrelevant.
<P>
</P>
<LI>
Known differences, perhaps configurable with a user preference variable.
<P>
</P>
<LI>
Unknown differences.
</OL>
<P>
The first category, irrelevant differences, do not affect computations
and most likely do not affect the execution of function files.
</P>
<P>
The differences of the second category are usually because the authors
of Octave decided on a better (subjective) implementation that the way
MATLAB does it, and so introduced "user preference variables" so that
you can customize Octave's behavior to be either MATLAB-compatible or
to use Octave's new features. To make Octave more MATLAB-compatible,
put the following statements in your `<TT>~/.octaverc</TT>' file, or use the
command line option `<SAMP>--traditional</SAMP>', which implies all of these
settings. Note that this list may not be complete, because some new
variables may have been introduced since this document was last updated.
</P>
<P>
<TABLE><tr><td> </td><td class=example><pre> PS1 = ">> "
PS2 = ""
beep_on_error = true
crash_dumps_octave_core = false
default_save_format = "mat-binary"
fixed_point_format = true
page_screen_output = false
print_empty_dimensions = false
warn_function_name_clash = false
</pre></td></tr></table><P>
Some other known differences are:
</P>
<P>
<UL>
<LI>
The Octave plotting functions are mostly compatible with the ones from
MATLAB 3.x, but not from MATLAB 4.x.
</UL>
<P>
The third category of differences is (hopefully) shrinking. If you find
a difference between Octave behavior and MATLAB, then you should send a
description of this difference (with code illustrating the difference,
if possible) to bug-octave@bevo.che.wisc.edu.
</P>
<P>
An archive of old postings to the Octave mailing lists is maintained
on ftp.che.wisc.edu in the directory `<TT>/pub/octave/MAILING-LISTS</TT>'.
</P>
<P>
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