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Conversion of a matrix into multiple column vectors

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Subham Burnwal
Subham Burnwal on 11 Mar 2015
Commented: Alpha Bravo on 20 Apr 2020
If we have a matrix A=[1 2 ; 3 4 ; 5 6] then it will be converted to vectors like x1= [1 3 5] x2= [2 4 6]

Accepted Answer

Stephen
Stephen on 11 Mar 2015
Edited: Stephen on 20 Apr 2020
If you know how many columns you want, then you can simply assign them in code like this:
>> A = [1,2;3,4;5,6];
>> X1 = A(:,1);
>> X2 = A(:,2);
If you have many columns, or an unknown sized matrix, then you can split it up using num2cell with the second optional argument:
>> B = num2cell(A,1);
>> B{1}
ans =
1
3
5
>> B{2}
ans =
2
4
6
Accessing the contents of the cell array is simple and efficient using indexing:
Accessing dynamically named variables like x1, x2, x3, etc. is not recommended, because it forces you into writing slow, complex, obfuscated, buggy code that is hard to debug. Read this to know why:
  5 Comments
Alpha Bravo
Alpha Bravo on 20 Apr 2020
kindly;
  1. reduce m x n matrix to its frequency count
  2. crosstab into 2x 2
  3. subject those to compute chi2 and p
  4. interpret that result
  5. that is, to find the chi2, and p of the given matrix; the goodness of fit test

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