how to calculate the indefinite integral of a numerical vector in matlab

To calculate the indefinite integral of a numerical vector in Matlab, you can use the cumtrapz function.

Here is an example code snippet:

main.m
% Define the numerical vector
x = [1 2 3 4 5];

% Calculate the indefinite integral
integral = cumtrapz(x);

% Plot the original vector and its integral
plot(x);
hold on;
plot(integral);
legend('Original vector', 'Indefinite integral');
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In this example, cumtrapz calculates the integral of the x vector from the first element to each element of x, resulting in a new vector of the same length as x. The resulting integral vector can be plotted along with the original x vector to visualize the cumulative effect of the integration.