prevent popup error when running FuncFit

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Wed, 02/20/2013 - 06:30 am

I am running a function which calls FuncFit from a Igor Batch File over and over. At times the data causes a singular matrix error and a popup. When this happens Igor seems to stop running the Igor Batch File which means no data is getting processed. When I click the Ok button for the error Igor starts working agian.

I would like to prevent these pop-ups since the Singular matrix errors are a low concern for me. Is there a way to do this, or some other work around to keep Igor running.

Thanks
I suggest you look at GetRTError() under the 'Command Help' tab. Assuming that singular matrices generate run-time errors this should work. See the code example given in the Help listing.

p.s. See also the Exchange node 662 for John Weeks' response.

February 20, 2013 at 07:12 am - Permalink

Try executing DisplayHelpTopic "Special Variables for Curve Fitting" and then scroll down to the description of V_FitError and V_FitQuitReason.

Example:
variable V_FitError = 0
FuncFit blah blah
if (V_FitError != 0)
   continue    // fit failed, move on to the next one
endif

February 20, 2013 at 07:12 am - Permalink

The problem wasn't catching the error, I knew when the fit was bad already, it was that the pop-up alerting me of the error stopped Igor from checking the IgorBatchFile for new commands to run.

Setting the variable V_fitOptions=4 seemed to solve my problem. It appears that this variable prevents the pop-ups.

Thanks everyone

February 21, 2013 at 05:15 am - Permalink