MATLAB: periodogram Showing Error "Invalid Value for Data" for Certain Input -

i trying use command periodogram in matlab 15a.

my periodogram code:

periodogram(ts_outside) 

when replace ts_outside ts_inside, working. above code, showing following set of errors (please note errors in in-built files of matlab):

error using dspdata/validatedata (line 14) invalid value data. data must vector or matrix containing real, positive values.  error in dspdata.abstractps/validatedata (line 8) dspdata.validatedata(this,data);  error in dspdata.abstractfreqresp/initialize>validate_data (line 77) validatedata(this, data);  error in dspdata.abstractfreqresp/initialize (line 23)     [data, datalen] = validate_data(this, data);  error in dspdata.psd (line 82) initialize(this,varargin{:});  error in periodogram (line 197)         hdspdata = dspdata.psd(pxx,w{:},'spectrumtype',options.range); 

i have checked imaginary values in ts_outside, using command imag. following result of that:

any(imag(ts_outside))  ans =       0 

as can see, imaginary part has no non-zero element.

i don't know problem variable. 33119x1 matrix, ts_inside. also, same set of errors showing when try use crosscorr on it. possible source of error?

also, check if there nan element in ts_outside vector:

any(isnan(ts_outside))