I have a data set of 400 columns and 644rows .I need to select columns 1,2,11,12,​21,22,....​.381,382,3​91,392 or move these particular columns in to a matrix.how can i write code for this in matlab

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1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20. from this columns i need to select 1,2,11,12 columns in to one matrix and the remaining in to another matrix. 20 is just an example..i want the answer for 400 columns and 644 rows.

Accepted Answer

Roger Stafford
Roger Stafford on 30 Mar 2016
If M is the matrix with 400 columns, and if M2 is the matrix to be obtained from it, do this:
n = 400;
M2 = M(:,mod((1:n)-1,10)<=1);
  2 Comments
Roger Stafford
Roger Stafford on 30 Mar 2016
n = 400;
M2 = M(:,mod((1:n)-1,10)<=1); % <-- Into one matrix
M3 = M(:,mod((1:n)-1,10)>=2); % <-- Into the other matrix

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More Answers (2)

Azzi Abdelmalek
Azzi Abdelmalek on 30 Mar 2016
Edited: Azzi Abdelmalek on 30 Mar 2016
A=[1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20]
idx=[1,2,11,12]
out1=A(idx)
out2=A(setdiff(1:numel(A),idx))

MHN
MHN on 30 Mar 2016
Edited: MHN on 30 Mar 2016
A = 1:20;
M1 = A([1,2,11,12]);
M2 = setdiff(A,M1);

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