MATLAB: Help using lastwarn.m

lastwarnwarning

I have code which does:

[msgstr, msgid] = lastwarn;
warning('OFF', msgid);
dostuff(); %generates a waring message
warning('ON', msgid);

The problem with this is that I still get one waring message, as the last warn before dostuff() was called was a different message.

I dont want to turn all warnings off as this is slow.

I would have thought that I could hard code the warning I want to turn off, but this doesnt seem possible:

"Warning: Out of range or non-integer values truncated during conversion to character."

how can I use msgid to ensure I never see that warning when calling do stuff? (I dont want to fiddle with the GUI settings either).

thanks

Best Answer

>> [msgstr, msgid] = lastwarn;
>> msgstr
msgstr =
Out of range or non-integer values truncated during conversion to character.
>> msgid
msgid =
MATLAB:nonIntegerTruncatedInConversionToChar

so I have msgid. What are you suggesting I do with it?

something like:

warning('OFF), 'MATLAB:nonIntegerTruncatedInConversionToChar'); ?

thanks

Related Solutions

MATLAB: Does ODE45 return an exit flag in MATLAB 7.8 (R2009a)

ODE45 does not return an exit flag in MATLAB 7.8 (R2009a). It performs the integration until it has converged on a solution and the tolerances have been met. However, a warning is generated if the integration tolerances are not met when the algorithm terminates.

The message identifier for the warning generated by ODE45 when the integration tolerances are not met is MATLAB:ode45:IntegrationTolNotMet. You may use the LASTWARN function to return the last warning message generated by MATLAB. For example, to check whether ODE45 generated the warning above, execute the following:

     [msgstr, msgid] = lastwarn;
     if strcmp(msgid, 'MATLAB:ode45:IntegrationTolNotMet')
        %execute desired code
     end

To ensure that you do not detect the same warning multiple times, use the following syntax to change the warning message and identifier, so that subsequent invocations of lastwarn return the message and identifier strings specified by new_msgstr and new_msgid, respectively.

    [msgstr, msgid] = lastwarn('new_msgstr', 'new_msgid')

Alternatively, you may check if the largest value of the first output argument 'T' is 'close enough' to the largest value of the second input argument 'tspan'. If the solution time vector 'T' does not cover the entire time span, the integration failed.

MATLAB: Remove warning message

Yes, you can use.

warning('OFF', 'MSGID')

Use lastwarn() to get the message ID for the warning you want to turn off.

Best Answer

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MATLAB: Does ODE45 return an exit flag in MATLAB 7.8 (R2009a)

MATLAB: Remove warning message

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