How to call a function with a vector?

Question

0 个投票

I need to modify the following code so that the function can be called with a vector for the value of b instead of just a single value. Any ideas?

4 个评论
显示 2更早的评论隐藏 2更早的评论

Stephen23 2019-3-6

You need to understand the difference between array and matrix operations, otherwise your MATLAB code will produce nonsense and you won't know why:

Stephen23 2019-3-6

编辑：Stephen23 2019-3-6

@Issie: you forgot to actually call the function. What you did:

>> result = (@(x) sin(x.^2), 0, 3, 50)
           ^^ Where is the function you want to call?

What you need:

>> result = fresnelS(@(x) sin(x.^2), 0, 3, 50)
            ^^^^^^^^ Your function !!!

PS: please do not post screenshots, posting actual text is much better (we already know what error message look like).

Answer 1

Kevin Phung 2019-3-6

编辑：Kevin Phung 2019-3-6

1 个投票

if you are multiplying or dividing vectors, include the element-wise operator

.* %multiplication
./ %division

example documentation:

Adam 2019-3-7

编辑：Adam 2019-3-7

h will be a vector if b is and h is multiplied and a division used to create it from b.

Kevin Phung 2019-3-7

编辑：Kevin Phung 2019-3-7

Thanks Adam. To clarify, given b is a vector , y and h would become vectors in:

h = (b-a)./n; 
y = f(a)+f(b); %where f is cos(x^2)