How to smooth using Savitzky-Golay Filtering

Hello, I need your help to smooth the attached file. It is a two-column txt file. The first column is the frequency and the second is the amplitude. I would like to smooth the second column. Any kind of help is appreciated. Thank you.

Answer 1

[John D'Errico]

Why not look on the file exchange? There are multiple tools there that claim to do Savitsky-Golay.

Even better, is to read the help/doc for smooth. It provides Savitsky-Golay as one option.

doc smooth

If you are asking for someone to write code for you, teaching you how to do Savistsky-Golay and providing complete code for it, that is arguably beyond the scope of Answers. (I for one won't do that.) Instead, you can find pseudo-code for it online. Then spend some time learning to do it in MATLAB from the algorithm.

[Muhsin]

I am not looking for someone to write the code. I do not the concept of available tools which smooths a function. My case is different and I just cannot implement to my case. Thanks for your informative comment by the way