How to declare input variables as a vector?

Given

function [y1,...,yN] = myfun(x1,...,xM)

In matlab is it possible that the input variable x1 is a vector?

Answer 1

[cr]

Of course it can be a vector, a matrix or a variable of some class.

[Walter Roberson]

Right. In MATLAB itself you do not have to declare any class or size information for parameters.

These days it is possible to add in information about class and size for argument validation purposes . That information is used at the time of calls to the function to verify that the parameters are valid, but it is mostly not reasoned about

[Walter Roberson]

The rules change a bit once you start using Simulink or MATLAB Coder

[cr]

I agree. Thanks for the note.

[Fidele Adanvo]

This means that in my .m I can call the function like this

[y1,....~]=myfun(x1,.....). where x1 is a vector?

for example x1=linspace(1,100).

[Steven Lord]

Sure, why not?

x = 0:360;
y = sind(x); % The input to the sind function is a vector
plot(x, y)

If you have a function that accepts multiple inputs and you want to pass in a vector and have each element treated as a separate input, that may not be as easy. As an example the hypot function requires two inputs:

z1 = hypot(3, 4)

z1 = 5

If you had the vector [3 4] and wanted to pass it into hypot as two separate inputs, the easiest way to do that would be to do it explicitly.

v = [3 4];
z2 = hypot(v(1), v(2))

z2 = 5

Some functions can accept either a vector or individual elements. Functions like ones are a prime example of this.

A1 = ones(3, 4)

A1 = 3×4

1 1 1 1 1 1 1 1 1 1 1 1

A2 = ones([3, 4])

A2 = 3×4

1 1 1 1 1 1 1 1 1 1 1 1

[Fidele Adanvo]

Now I understand why my code gave an error.

Thank you