Of course, it could well be taken out at any future Matlab release, but for the time being we can definitely make good use of it. This looks like a pretty stable feature, as far as undocumented features go. % Restore the warnings back to their previous (non-error) stateįor the record, this warning(‘error’,…) trick appears to work in Matlab releases as far back as R14SP3 (2005), and possibly even earlier (I don’t have older releases readily available, so I couldn’t check). Warning('error', 'MATLAB:DELETE:FileNotFound') įprintf('Can''t delete %s (reason: %s)\n', fileToDelete, lasterr) S = warning('error', 'MATLAB:DELETE:Permission') Warning ( 'error', 'MATLAB:DELETE:FileNotFound' ) įilesList = įor fileIndex = 1 : length (filesList ) try % Regular processing partĬatch % Exception-handling part fprintf ( 'Can' 't delete %s (reason: %s)\n', fileToDelete, lasterr ) Įnd end % Restore the warnings back to their previous (non-error) state warning (s ) S = warning ( 'error', 'MATLAB:DELETE:Permission' ) % Set a couple of warnings to temporarily issue errors (exceptions) After we have finished processing, we can return the warning state to its previous value. The effect is to turn the specified warning ID into an error, that can then be trapped in a standard try– catch block. It appears that in addition to the documented alternatives for the value of the warning function’s first parameter (namely ‘Message’,, ‘On’, ‘Off’ and ‘Query’), there is also an undocumented alternative of ‘Error’. This question was asked on the CSSM newsgroup many years ago and received no answer, until Michael Wengler recently provided the undocumented solution on that thread: However, what should we do in case the checked condition is meant to prevent a warning (e.g., file-access warnings) rather than an error? It would make sense to use the same exception-handling trick, but unfortunately warnings do not normally raise a trappable exception.
There is not enough memory to open in editor matlab code#
End end % Faster code for loopIndex = 1 : N
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