Integration of a function multiplied by an array

Hi all,

I want to integrate a symbolic function which is multiplied by a vector, for example:

syms x

y1 = linspace(0,1,10);

y2 = @(x) x.*y1;

q = integral(y2,0,1);

However, the integral execution fails due to 'Matrix dimensions must agree.'.

Is there a solution for this?

Thanks!

Ron

Answer 1

[Abolfazl Chaman Motlagh]

your y2 function return Array for every single number as it's input.

syms x
y1 = linspace(0,1,10);
y2 = @(x) x.*y1;
y2(1)

ans = 1×10

0 0.1111 0.2222 0.3333 0.4444 0.5556 0.6667 0.7778 0.8889 1.0000

according to documentation of integral function if fun has Array output, you should use option ArrayValued:

q = integral(y2,0,1,'ArrayValued',true)

q = 1×10

0 0.0556 0.1111 0.1667 0.2222 0.2778 0.3333 0.3889 0.4444 0.5000

[Ron Nativ]

thanks!