How can I find the baseline of signal?

I have a signal like this. How to compute the baseline of the signal? I way trying to use medfilt1, but I can't get rid of the peaks.

Answer 1

[Star Strider]

See if the min function will do what you want.

If you want to plot a horizontal line indicating the minimum, and if ‘y’ is the signal you are plotting, one option is:

plot(xlim, [1 1]*min(y))

another option is:

yline(min(y))

.