MATLAB: Incomplete gamma function calculation incomplete gamma function. Hi, I have this equation: gamma(5,x) = 2 how I can find the value of x? Thanks Best Answer I don't believe that's possible:gammainc(5,0)gammainc(5,1000);it never goes near two.Moreoptions = optimoptions(@fminunc,'tolfun',10^-10,'tolx',10^-12);xv = fminunc(@(x)(gammainc(5,x)-(10^-4)).^2,4,options)%xv =15.6926gammainc(5,xv)% ans =% 1.0004e-04 Related SolutionsMATLAB: How to use fminsearch or fmincon for a multivariable integral function [x,fval,exitflag,output] = fminsearch(@(x)F(x(1),x(2)),x0,options); MATLAB: What’s the difference between gammainc & igamma? Which one should I use to compute incomplete upper gamma function? Which one is scaled? igamma lives in the stats toolbox. It gives you an upper tail integral.gammainc lives in MATLAB proper. gammainc is scaled.The two functions also swap meanings of the arguments. So be careful.1 - igamma(5,2)/gamma(5)ans = 0.0526530173437112gammainc(2,5)ans = 0.0526530173437111 Related QuestionWhat is this mean: Gradient must be provided for trust-region algorithmI get matlab error :Failure in initial user-supplied objective function evaluation. FMINCON cannot continue.Problem with gammainc functionFMINUNC cannot continue.CDF of gamma distribution
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