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MATLAB is taking too much time to solve the following integral?

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chaaru datta
chaaru datta 2022-6-11
评论： chaaru datta 2022-6-13
Hello all, I am trying to solve the following integral but MATLAB is taking too long to solve it.
---- (1)
where is lower incomplete Gamma function, x is variable of integration and all other things are constant.
Any help in this regard will be highly appreciated.
  1 个评论
chaaru datta
chaaru datta 2022-6-11
I tried to write the MATLAB code for first lower incomplete Gamma function but got the following error: Limits of integration must be double or single scalars.
Here is the code that I had written:
G = @(x)((gam_s*(1+x)-1)/(A*sig2_fsnrn));
G1 = @(x) x/(A1*sig2_fsnen);
fun = @(t) t.^(1+d-1).*exp(-t);
low_gam = integral(fun,0,G);

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Dyuman Joshi
Dyuman Joshi 2022-6-11
编辑：Dyuman Joshi 2022-6-11
integral is used for numerical integration of functions, not partial integrations. It expects numerical value for 2nd and 3rd input.
Check out gammainc to define lower incomplete gamma function.
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chaaru datta
chaaru datta 2022-6-13
I know about this function also. However if I use it then it gives me the error : Inputs must be real, full, and double or single.
chaaru datta
chaaru datta 2022-6-13
Thank you so much @Torsten sir and @Dyuman Joshi sir. Its because of your suggestions, I could implement and plot the equation in MATLAB.

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