How to get data from 2D array and put into 1D array

Question

I have a 2D array and I want to create a 1D by MATLAB, satisfying the requirement that each element of the 1D output was created by the value of a given index into the 2D array.

Answer 1

You can use cellfun to do it. You convert A into cell by column, and execute f for each element of the cell.

 A=[2 4 6; 1 2 7];

 % some example f funcion that just adds the col_index_A and row_index_A
 f = @(col_index_A, row_index_A) col_index_A + row_index_A; 

 % execute f with parameters that come from each column of A
 B = cellfun(@(c) f(c(1), c(2)), num2cell(A, 1));

 B =

     3     6    13