error in envelope function

The envelope function always gives me an error when I enter the input 'peaks', whatever the data may be. The error that appears is this:

Error using findpeaks

Too many input arguments.

Error in envelope>envPeak (line 181)

[~,iPk] = findpeaks(double(x(:,chan)),'MinPeakDistance',n);

Error in envelope (line 79)

[yupper, ylower] = envPeak(x,n);

I have looked at three different versions of Matlab and it gives me the error in all three.

Answer 1

[Steven Lord]

Let's make sure you're using the findpeaks function included as part of Signal Processing Toolbox. What does this command show when you run it in the three different versions of MATLAB where this error occurs?

which -all findpeaks

/MATLAB/toolbox/signal/signal/findpeaks.m
/MATLAB/toolbox/signal/gpu/@gpuArray/findpeaks.m  % gpuArray method

[Victor]

Thank you so much!

Here was the problem. when i use this comand:

which -all findpeaks

There was one more carpet:

CHRONUX_SSP\chronux_2_10_code_and_data\chronux\spectral_analysis\continuous\findpeaks.m

And it was this carpet where it was the problem with findpeaks function.

I really appreciate your response