I have the following integral
$$\int_{-\infty}^{\infty} g(t-\tau) \, \mathrm d\tau$$
where $g(\cdot)$ is a known function, e.g., $g(t) = \sin(t)$, and I want to evaluate its value with MATLAB. How should I do this in discrete form? Thanks.
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3$\begingroup$ But in your example, $\int_{-\infty}^{\infty}\sin(t-\tau)d\tau$ does not exist. $\endgroup$– msmCommented Jun 16, 2017 at 19:35
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1 Answer
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Use integral function.
q = integral(g,xmin,xmax)
For example $g(t) = e^{-t}$
$$q = \int_0^{\infty}e^{-t}\mathrm{d}t = 1$$
g = @(t) exp(-t);
q = integral(g,0,Inf)
More information Matlab numerical integration
