(octave.info)Handling Errors

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12.1 Handling Errors
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An error is something that occurs when a program is in a state where it
doesn’t make sense to continue.  An example is when a function is called
with too few input arguments.  In this situation the function should
abort with an error message informing the user of the lacking input
arguments.

   Since an error can occur during the evaluation of a program, it is
very convenient to be able to detect that an error occurred, so that the
error can be fixed.  This is possible with the ‘try’ statement described
in Note: The try Statement.

Raising Errors

Catching Errors

Recovering From Errors