area under a curve ?

[amalina ibrahim]

can anyone help me the exact coding for area under a curve ?

Answer 1

[Sulaymon Eshkabilov]

This plot is from Simulink Scope as shown here. You'd need to get the data imported into MATLAB woskpace, select the necessary region of the imported data and then perform summation with trapz().

[Sulaymon Eshkabilov]

Let's say your imported data has two columns of data (Col 1 is X and Col 2 is Y) representing the selected curve. So then, the area under the curve will be: trapz(X, Y)

[amalina ibrahim]

thank you for giving me an idea. it helps me a lot

[Sulaymon Eshkabilov]

Most welcome!

Answer 2

[Sulaymon Eshkabilov]

Use trapz() that gives you the numerical integration under the curve.

[amalina ibrahim]

i dont really understand how to apply it. mind to share ?