MATLAB: Number of variables vary in function definition

functionvariable declaration

Hello,

I tried looking at following problem under all angles but couldn't find a solution: I have a matrix A with n number of rows and p columns. Whereas the number of columns is fixed, the number of rows is dependant on a parameter. I want to concatenate the values of each column to one element and this formula would give me the output that I wish if the number of rows is 5:

X = arrayfun(@(x,y,z,w,v) (strcat(num2str(x),num2str(y),num2str(z),num2str(w),num2str(v))),A(1,:),A(2,:),A(3,:),A(4,:),A(5,:),'un',0);

However, in my case the number of rows varies and therefore the number of variables x,y etc. vary as well.

Do you know a way to automatically adjust the number of variables and the rest of parameters (num2str(x), A(1,:), etc.) accordingly? I suspect this could be possible with a loop but couldn't find the way to do it.

Thanks!

Best Answer

Here is a different approach, using a loop and sprintf:

% Count columns and preallocate X
numberCols = size(A,2);
X1 = cell(1,numberCols);
% Fill cell with desired strings
for nc = 1:numberCols
    X1{nc} = sprintf('%d',A(:,nc));
end

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okay so doing a quick testing with different inputs the issue is when you put in an input like 'a'. where the logic checks would become empty. So what i did is broke it out and when the deleterow number is empty put one of the other conditionals so it would loop again. It would break out of the loop iff none of the loop conditions are met.

    W=[1 2 3 4 5]
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x = rand(10,1) ;
y = rand(10,1) ;
plot(x,y,'.r')
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