Change in behavior of filtfilt function between 2016b and 2019b?

Hello,

I developed some signal processing code using Matlab 2016b, and a colleague is getting an error trying to use it on Matlab 2019b. The code is supposed to bandpass filter the columns of a data matrix, some of which might contain all NaNs (having been previously removed for being poor quality data). On my version of Matlab, passing this matrix into filtfilt works fine, and the NaN columns just stay NaN. But on her version, she gets the error:

`Error using filtfilt

Expected input to be finite.

Error in filtfilt>efiltfilt (line 114)

validateattributes(x,{'double'},{'finite','nonempty'},'filtfilt');

Error in filtfilt (line 89)

y=efiltfilt(b,a,x);

I'm not able to reproduce this error with her data in my version of Matlab. The only thing I can do to get the same message is to literally type out validateattributes(dataMatrix,{'double'},{'finite','nonempty'},'filtfilt'), which suggests to me that my version of filtfilt is not executing that line of code? Has there been an update to the filtfilt function between 2016b and 2019b?

[Mason Kadem]

I'm getting this exact same issue.

[Eloise Anguluan]

Same here, a code I have been using for a long time gets this same error in my friend's PC running Matlab 2019b. Any updates from Matlab?

[laura healey]

Same issue... any updates?

Answer 1

[Walter Roberson]

Yes.

By R2020a x is explicitly documented as having to be finite valued. The code test was added in a previous release, but the document took time to be updated.