How to call a function with a vector?

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?

[Adam]

Depends what f does, for a start.

[dpb]

To vectorize expressions to operate on element basis, use the "dot" operators...

f=@(x) cos(x.^2);

Whereever else you have similar expressions, must make same fixes.

See the section "Array vs. Matrix Operations" under the "Operators and Elementary Operations" section.

[Stephen23]

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

https://www.mathworks.com/help/matlab/matlab_prog/array-vs-matrix-operations.html

[Stephen23]

@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]

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

.* %multiplication
./ %division

example documentation:

https://www.mathworks.com/help/matlab/ref/times.html

[madhan ravi]

? where was vector multiplied or divided?

[Adam]

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

[Kevin Phung]

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)