Intergrating the data using a scalar value

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I am trying to do integration of a excel data. When I try to do that I am getting an error as follows:
Error using cumtrapz (line 51)
Dimension argument must be a positive integer scalar within indexing range.
Please can someone help me in solving that .
My code:
X1 = xlsread('Abb76at104.xlsx','A1:A63');
Y1 = xlsread('Abb76at104.xlsx','B1:B63');
V = 40.020;
A1 = pi*(X1).^2;
Q1 = A1.*Y1;
Int1 = cumtrapz(A1, V);
X2 = xlsread('Abb76at104.xlsx','A64:A130');
Y2 = xlsread('Abb76at104.xlsx','B64:B130');
A2 = pi*(X2).^2;
Q2 = (A2).*40.02;
Int2 = cumtrapz(A2, V);
Thanks in advance.

Accepted Answer

Mathieu NOE
Mathieu NOE on 12 Oct 2021
see the doc for cumtrapz
I believe you simply put the arguments in the wrong order
it must be
Int1 = cumtrapz(V,A1);
Int2 = cumtrapz(V,A2);

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