[Tftb-help] use of tfrstft

[FLOTTE Didier]

hello,

 

We try to use the function tfrstft with a long signal, around 50,000 points and an error is occured:

 

??? Subscript indices must either be real positive integers or logicals.

Error in ==> tfrstft at 85
 tfr(indices,icol)=x(ti+tau,1).*conj(h(Lh+1+tau));

Error in ==> programme at 48
        tfr=tfrstft(file',t,128);

 

file' is the signal, t give the vector time and we chose a length of 128 for the number of frequency bins. However, if we reduce the file vector to 256 points, the function works well.