how to connect the upper points of a sine curve by making them a curve?

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i want to extract a curve like what is in red from the plot in blue how can i do that?
je veux extraire une courbe comme il est indiqué en rouge d'aprés la plot en bleu comment je peux aire ça?
  1 件のコメント
Jose Manuel Castiblanco Quintero
Jose Manuel Castiblanco Quintero 2022 年 8 月 7 日
Try to use find command, index the results and to use fitter curve app!



Star Strider
Star Strider 2022 年 8 月 7 日
Use the envelope function (R2015b and later) in the Signal Processint Toolbox.
envup = envelope(y);
The function has a number of options, so choose the one (probably 'peak') that gives the resullt you want.
  4 件のコメント
Star Strider
Star Strider 2022 年 8 月 7 日
As always, my pleasure!


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