Partial Integration in Matlab r2015a

Hello everybody,

I have a question about partial integration in matlab r2015a

I have an equation that is

f(s,n) = int(s*f_gamma(s,n),s,0,W)

I want to integrate s*f_gamma(s,n) partially because it won't work if I integrate it with normal integral function,

but in matlab r2015a, there is no integrateByParts(f,du) command.

So, anyone can give me some suggestions? It will help me a lot

Thanks.

[Kevin Zheng]

I don't really like to give non-answer answers, but if you want to compute indefinite integrals, I would suggest using something like WolframAlpha, or Wolfram Mathematica as opposed to Matlab.

If you actually just want to compute a definite integral, then you can do this.

integral(@(s) s .* f_gamma(s, n), 0 , W)

Before, you were trying to muliply a number with a function, which mathematically is fine, but programmically isn't since a function is pretty complicated. This code snippet will create a new function whose content is s .* f_gamma(s, n), then integrate it. Of course, I hope the variable n is already defined yes?

Read more here https://www.mathworks.com/help/matlab/matlab_prog/anonymous-functions.html