unrecognized function or variable 'helperspe​echSpectro​grams'

I am using the helperspeechSpectrogram function in a Speech Emotion Recognition progam, and I have the toolboxes installed required for this function.

I am using another function, helperReadSPData, from the same toolboxes which works without errors. if anyone could help me out with what is going wrong here, it would be a big help.

segmentDuration=60000*(1/16000);
frameDuration=0.046;
hopDuration=0.023;
numBands=128;
epsil=1e-6;

scadts_Train=transform(adsTrain,@(x)helperReadSPData(x))
XTrain=helperspeechSpectrograms(scadts_Train,segmentDuration,frameDuration,hopDuration,numBands);
scadts_Test=transform(adsTest,@(x)helperReadSPData(x));
XTest=helperspeechSpectrograms(scadts_Test,segmentDuration,frameDuration,hopDuration,numBands);

[Rimsha Muzaffar]

My (x) helperReadSPData (x) This function is not working, what you can use for it

[Walter Roberson]

@Rimsha Muzaffar

https://www.mathworks.com/help/wavelet/ug/spoken-digit-recognition-with-wavelet-scattering-and-deep-learning.html#SpokenDigitRecognitionWaveletScatteringAndDeepLearningExample-9 has the code for that.

[Adam Danz]

helperspe​echSpectro​grams does not appear to be a MATLAB function.

helperReadSPData is probably from a demo in the MATLAB documentation. You can find it here.

[Rimsha Muzaffar]

should we take another class to define this function or define them in same

this one na

function x = helperReadSPData(x)

% This function is only for use Wavelet Toolbox examples. It may change or

% be removed in a future release.

N = numel(x);

if N > 8192

x = x(1:8192);

elseif N < 8192

pad = 8192-N;

prepad = floor(pad/2);

postpad = ceil(pad/2);

x = [zeros(prepad,1) ; x ; zeros(postpad,1)];

end

x = x./max(abs(x));

end

I am actually confused where to write this

[Adam Danz]

MATLAB has to know that helperReadSPData exists. One way to do that is to put the function in an m-file and store the m-file on your matlab path (perhaps in the same folder you are working in). Another way to do that is to define the function at the end of the m-file you're working in. For more info, see Create Function in Files from the documentation.