Sure. I will try it. In the first post I have enclosed the picture of the

wanted result. I have an input vector x. (which can also have a shape of

ordinary sine wave). What I need to do is create a result signal y which

picks up local max values (peaks) and from there the value of y exponentialy

decays with the T as a time constant until the input signal x value is

smaller than y. If the input x is greater again than the exponential decayed

signal, then the resulting y takes the shape of X again. However, it is

important that the y never drops to 0 or gets lower than x and that it

strictly follows local peaks of x. Perhaps an low pass filter would do this

task or also some kind of averaging. I am enclosing the picture again.

ex.png <

https://octave.1599824.n4.nabble.com/file/t373917/ex.png>

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