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 2d comment How would it looks the Fourier series of this signal? 2d comment How would it looks the Fourier series of this signal? You can see in the picture: part of sine + part of square + part of triangle + part of inclinated straightline... and so on. i.e. random/crazy signal. 2d comment How would it looks the Fourier series of this signal? No. That's a "hypothetical" signal I'd like to get summing up sin.I have nothing, and I need some "random" fourier series that can give to me such a signals. 2d comment How would it looks the Fourier series of this signal? but I don't have g(t). I need to create it summing sin (so, the inverse process). Mar 12 comment How to choose new points after grouping/resampling? think of this also in this way: If I just choose blu point every fifth samples Ill lost an important information: the max and min peaks at every slope. I mean: if the curve change the inclination (check the first slope) it will take a blu point that could be inferior to the actual peak. thus, min/max absolute values for the signal will change. I don't want this... Mar 12 comment How to choose new points after grouping/resampling? yes you are right. but I don't have that kind of control in what I'm doing. I have some primitives that does this finding min and max peaks (which can help to draw a waveform, for example). This is what I have unfortunately... Mar 12 comment How to choose new points after grouping/resampling? Real signal got something like 700000 points, which I cant display on a limited amount of pixel. So Im resampling... Mar 12 comment How to choose new points after grouping/resampling? exactly that! It is far away from where it should stay (blu One). do you see? Mar 12 comment How to choose new points after grouping/resampling? Not really! See the 4° slope: the 3° choosed point is wrong... Mar 11 comment How to choose new points after grouping/resampling? I don't need to recostruct blue value. I'm starting from blu, reducing points. Once reduced, I need to draw the simil-signal that would be if I kept blu values. Do you see? It's a sort of "compressing" values... Feb 23 comment How to scale/stretch this signal? Uhm, it seems to works! What was wrong with my function? Feb 23 comment How to scale/stretch this signal? @EricTowers: I've added the whole signal, so you can check it out. Feb 15 comment Round to down - Remainder emulation? I could use round(x-1/2). But for int (i.e. tie breaking 0.5) it round ho even (which I don't want; it is not flooring). What do you mean with x-i for integers 1..2? I don't get it... Feb 3 comment How can I bend a straight line? Nice. With some math and programming, I got Cubic Bézier curves and makes my own bend! Thanks a lot! Jan 16 comment Can I do this kind of process with a pure math function? As I said, I can't do any assignement, and prev = n is! Jan 10 comment How can I map this range in a function? @Oliver: of course 1 ;) Jan 9 comment How can I map this range in a function? It works perfect! Thank you! Jan 9 comment How can I map this range in a function? No, can't use boolean logic. This is what I can use: image-line.com/support/FLHelp/html/plugins/… Jan 9 comment How can I map this range in a function? Can't use this "syntax". I have to write it as "command line/math expression" in a software. Such as y= Input*0.25 + 0.25... Jan 9 comment How can I map this range in a function? Sorry, I've updated the question ;)