How to create a function with a matrix M as an input

Hello,

I need to write a function with one input argument: a Matrix M. As an output, it should return a matrix that contains only those elements of M that are in odd rows and columns. I understand the idea but its hard to grasp how i will define a matrix M as an input. What I wrote is

function oddmatrix = odd_index(row,col)

M=rand(row,col); temp=M(1:2:end,1:2:end) oddmatrix=temp(:,:)

end

But then M is not an input anymore.

Any help will be highly appreciated

Answer 1

[Stephen23]

You are told that the function should have one input argument, but then you created a function with two input arguments: row and col. Here is a function with one input argument:

function out = odd_values(M)
... code here
end

Note that you do not need to assign to a temporary variable, you can simply assign to the output variable directly, so that code might look something like this:

out = M(1:2:end,1:2:end);

And now there is nothing else that you need to do except put it together.