# MATLAB: Definite integral w/o using symbolic variable

definite integral inline quadl

I am trying to integrate a function, then store that value, then change a value in the function, integrate again, store that value, and so on.
here is the idea
x=0:10;x1 = 2;x2 = 5;m = 1;i = 1;if m < 5F = inline('m*x');AUC(i) = quadl(F,x1,x2);m = m+1;i = i+1;endM=1:4;plot(M,AUC)
obviously this code does not work. I need to update the line F=inline for every value of m. How do I do this, or is there another way?

• m = 1:4;x1 = 2;x2 = 5;AUC = arrayfun(@(i1)quad(@(x)i1*x,x1,x2),m)
n  = numel(m);AUC = zeros(n,1);for i1 = 1:n    AUC(i1) = quad(@(x)m(i1)*x,x1,x2);end
k = 3+4i; % e.g.q = 6-4i; % e.g.I = @(x)abs((exp(-((1i*k)/(2*q))*x.^2).^2))/2;quadgk(I,2,-3*1i)