arrayfun syntax and use with scalar input

Hello people,

I've been (ab)using arrayfun and cellfun for some time without fully understanding the syntax. It centers around '@' symbol followed by the arguements.

To demonstrate, if I want to add 2 arrays, I can do:

a=[1 2;3 4];

b=[5 6;7 8];

c=arrayfun(@(x,y) x+y,a,b);

But what if I wanted to simply add a scalar?

a=[1 2;3 4];

b=2;

c=arrayfun(@(x,y) x+y,a,b);

Error: All of the input arguments must be of the same size and shape.

Previous inputs had size 2 in dimension 1. Input #3 has size 1

So is there a good summary of arrayfun as it's used above? Can one treat an input as a scalar or vector and others as arrays?

Thanks,

-Chris

[Stephen23]

"Can one treat an input as a scalar or vector and others as arrays?"

No, but you can easily parameterize the function using an anonymous function:

https://www.mathworks.com/help/matlab/math/parameterizing-functions.html

[checker]

Thanks for the link. I'll spend some time on it.

Answer 1

[James Tursa]

To use a scalar you could use this syntax:

    a=[1 2;3 4];
    b=2;
    c=arrayfun(@(x)x+b,a);

The function handle would pick up b from the workspace.