# I am trying to create a function form a vector from my matrix and I do not understand where my mistake is?

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Laurence Guevremont on 27 Sep 2016
Commented: dpb on 29 Sep 2016
function A=combined (V)
for V(k)= A(i,j)
k=1;
for
i=1;
j=1;
k=k+1;
end
end
dpb on 27 Sep 2016
Indeed, there are several issues but the one of defining the for...end loop indices and range is key. To do the requested function, using "linear addressing" would be a good way to proceed. Look those up in the documentation and study for loops...

Moe_2015 on 27 Sep 2016
Edited: Moe_2015 on 27 Sep 2016
You should avoid using a for loop here. You can do something like this:
function myVector=combined(myMatrix)
myVector = reshape(myMatrix,1,numel(myMatrix));
end
Laurence Guevremont on 27 Sep 2016
But I need to create a function I cannot use one already made by matlab

dpb on 27 Sep 2016
"...transform my matrix into a vector"
Really don't need a function for this; Matlab has syntax to do it already. A previous answer shows reshape, except I'd suggest to simply use it ( reshape, that is) inline as shown there in the function instead.
There's another Matlab idiom that's even more compact--
A=A(:).'; % convert A of unspecified dimensions to row vector
NB: the .' transpose operator to return the requested row vector instead of the column vector colon returns.
##### 2 CommentsShowHide 1 older comment
dpb on 27 Sep 2016
Then wrap the above inside the function wrapper. Unless the assignment also requires a loop be used???

James Tursa on 28 Sep 2016
Here is an outline of what you need to be using for the for loops (seems to be a requirement for this assignment).
% Insert any initialization code here
for i = 1:size(V,1)
for j = 1:size(V,2)
% Insert your assignment etc code here
end
end
dpb on 29 Sep 2016
If OP is clever, this can be done with one loop... :)