How can I apply smooth curve fitting to my data

Hi. I wonder that is there any method to fitting my original data(blue) to be red smooth curve?

Answer 1

[Jan]

See https://www.mathworks.com/help/signal/ref/envelope.html

[Gyeongtae]

Thank you Jan! :)

[Image Analyst]

By the way, there is a closely related boundary() function: https://www.mathworks.com/help/matlab/ref/boundary.html?searchHighlight=boundary&s_tid=doc_srchtitle that you might enjoy learning about.