How do I access an element of an array of equations

This is the code I want to work

a = @(x) 3*x;

b = @(x) 5*x;

y =@(x) a(x):x:b(x);

y = y(x);

y(1)

a and b are functions of x so I want y to be 3x, 4x, 5x and I want to be able to acces an element (ex: 4x) but I can't figure out the syntax

Answer 1

[John D'Errico]

If x is symbolic, you CANNOT use it in a colon call. But in the end, you did not ask for a symbolic result, but a function of x.

So trivially, you can do this:

a = @(x) 3*x;
b =  @(x) 5*x;

y = @(x) (a(1):b(1))*x;

y(1)

ans = 1×3

3 4 5

y(3)

ans = 1×3

9 12 15