How do I find more than one max, min and intersections values for different segments of the graph?

I am able to graph the data. As shown in the picture there are multiple segments of each graph

. How do I find multiple max and mins for each graphs for that particular segment? Also, all the intersecting points on the graph.

Answer 1

[Jon]

On the file exchange, look for peakdet.m for peaks/valleys and intersections.m for intersections (there are many types of both functions).

Answer 2

[KSSV]

The function in the link gives you intersections.

http://www.mathworks.com/matlabcentral/fileexchange/22441-curve-intersections