Equation of line for double integration.

I have two vectors, I want to double integrate the vector along y-axis with respect to vector along x-axis, maybe by using integral2 command. I have difficulty in forming equation for the double integral, please help me

[Rik]

What do you mean by integration? It doesn't make sense to me to mean the opposite of derivative, as a vector is not a function.

[Muddassir Iqbal]

Sir, I am appreciating your fast observation.

Actually I have some values of a variable, which I found through Lab work / numerical computations.

If I have 100 values, I can take double integral of each two concecutive values and thus attaining 99 answers.

I can join those points to form another vector.

[Walter Roberson]

What is the "double integral of each two consecutive values" ? Do you mean like

V(1:end-1) + V(2:end)

??

[Muddassir Iqbal]

Sir, I have just two constant values along y axis and two corresponding values along x-axis

[Walter Roberson]

Those do not sound like vectors?

If you are trying to find the area of a rectangle then multiply the x difference by the y difference.

[Muddassir Iqbal]

Dear Sir, I have to do double integration. Which is not possible by merely multiplying x-axis with corresponding y-axis.

How about making aline equation and then using Integral2 command.

Regards

Muddassir

[Walter Roberson]

integral2(@(x,y) ones(size(x)), low_x, high_x, low_y, high_y)

Answer 1

[Walter Roberson]

I suspect that you will want at least one cumtrapz() and then either cumtrapz() again or else trapz() depending on what you are trying to calculate.