Finding the peaks in figure

I have two matrices

A = [ nx1] & B = [ nx1]

When I plotted them it was fine in plot (A,B )

But when I tried to found the peaks by using

Data = [ A,B ] Pks = foundpeaks (Data) It didn't work Because plot (Data) showed me a figure of two lines *one line is for matrix A & second for B *

[Jan]

What is "foundpeaks"? Do you mean findpeaks?