I want Simlink library "dspxform3" as matlab code as is. How do I do it ?

I am looking for script in .m file for Short-Time Fourie Transform. I found that Simulink Library dspxform3 is an exact function I want. How do I get Matlab script from dspform3? I assume that I can change some parameter settings such as windows kind/length/degree of overlap to adjacent frame in the script. Thank you for your corporation in advance. Best regards, Hiroshi Sekiguchi

[mizuki]

Is dspxform3/dspform3 a block in Simulink?

I searched the block with

>> docsearch dspxform3
>> docsearch dspform3

on MATLAB, but could not find them.

In DSP System Toolbox, there is a function dsp.FFT. That might work on your case.

If you could give us more details what you exactly want to do, we might be able to give you a suitable answer.

You can also ask questions in Japanese here if you want to :)

[Walter Roberson]

It appears to be https://www.mathworks.com/help/dsp/ref/shorttimefft.html dspxfrm3

Answer 1

[Walter Roberson]

If you are looking for MATLAB code for STFT then see

https://www.mathworks.com/matlabcentral/fileexchange/45197-short-time-fourier-transformation--stft--with-matlab-implementation

[Hiroshi Sekiguchi]

Hi Robert, Great! it is what I am looking for in functionality! But I have major issue. I ran this example and STFT script with example waveform, track.wav. I changed wavread to audioread because it is old. But I got a failure message, saying " Matlab encountered low level graphics error and could not make graphics properly. Solve low level graphics error. For debugging, see the attached .txt file for detail. My machine is 7 month old Window10 and I happended to check&update all periheral drivers including graphics last night. Hiroshi

[Walter Roberson]

https://www.mathworks.com/matlabcentral/answers/108644-why-do-i-get-java-exceptions-when-opening-many-figures-using-simulink-with-many-scopes-or-using-cft suggests graphics drivers problems as most likely.