Calculate area under every point in a graph

I want to calculate the area under every point in EMG graphs. I have used the script: Int = trapz (x,y); however this calculates the entire area under the graph instead of the area under every point. What would be the script for this?

[KSSV]

How you will get area under a point? To get area at least you need two points...

Answer 1

[Cam Salzberger]

Hello Debbie,

I am assuming that you mean "area under a segment between two points" since, as KSSV says, you can't have an area under a single point. In this case, assuming you know that you want the area of the "ith" line segment (between the "ith" and the "(i+1)th" points), you can just do:

val = trapz(x(i:i+1), y(i:i+1));

If you simply want the height of a point, rather than the area, then it's just y(i).

-Cam