Numerical integration using cumtrapz

how to add upper and lower limits in cumtrpz function?

Answer 1

[Star Strider]

The cumtrapz function integrates a vector, and ideally, the dependent variable vector with respect to the independent variable vector.

The limits of the independent variable vector are the limits of the integration, so for example:

x = 0:42;
y = randn(size(x));

Int_y_dx = cumtrapz(x, y);

figure
yyaxis left
plot(x, y)
ylabel('$y(x)$', 'Interpreter','latex')
yyaxis right
plot(x, Int_y_dx)
ylabel(sprintf('$\\int_{%d}^{%d}y(x)\\ dx$',min(x),max(x)), 'Interpreter','latex', 'FontSize',14)
grid
xlim([min(x) max(x)])

.

[Somnath Kale]

Thank you!! @Star Strider

[Star Strider]

As always, my pleasure!