How to integrate the discrete data?

Hi,

I am having a 3 2d matrices

1st matrix is of size NxM corresponds to the X-cordinates

2nd matrix is of size NxM corresponds to the Y-cordinates

3rd matrix is of size NxM corresponds to the Power at the above designated cordinates

How to find the Total power and total power above half maximum?

[Jan]

Isn't the total power simply the sum of the powers? The half maximum of what?

[Vinay Killamsetty]

Yeah, thats true.

Thank you for your advice.

Answer 1

[Prachi Kulkarni]

Hi,

Integration is equivalent to summation in the discrete domain. So, if P is your NxM power matrix, you can compute the total power and total power above half maximum as follows, assuming the power is in watts.

totalPower = sum(P,'all');
maxPower = max(P(:));
totalPowerHalfMaximum = sum(P(P>0.5*maxPower));