How can you find Patrick Flandrin's source codes in his TF publication? I am reading his publication **Elements de Traitement du Signal** but I cannot find his sources codes such as files _change.m, sousech.m, ..._ Some his TF codes are here, and probably, he is about these codes too here partially. His homepage here. He speaks French but I do not know about his English proficiency. I contacted him unsuccessfully. Some versions of his publication * 0.89 with colloboration * here references to his files

I think the codes are here about _enseignement_ which is Teaching, not Contributions as Google Translate proposes. However, I cannot find exactly the file `sousech.m` which can be French. I think _change.m_ is nowadays _mean_change.m_. _AR_change.m_ is also missing.

I got now also answer from the author. He said that most codes are in the page above. The author is fluent in English.

I also asked for the missing files. He answered

* sousech.m is some extra file
* AR_change.m have changed into ARMA_change.m



This work is his old stuff so he could not provide exact answers, he said. Still, the challenge is when some papers refer to his paper, I should be able to reproduce the effects. So better answer is also welcome who knows more about this.

About time-frequency stuff, he says that rather go to here.