How to values for a matirx

There is matix A of size 12x1000, How to get elements at the 100's poistions like at 100, 200, 300, ....,1000. And assign it to another matrix/list

Each entry at the 100's position must contains all 12 rows from the original matrix.

I tried something like this

for temp = 0:1000

selected_matrix = a(:,temp+10)

end.

Can anyone suggest me how to do this.

Answer 1

[Ameer Hamza]

Try this

a; % 12x1000 matrix
selected_matrix = a(:, 100:100:1000)

Read about indexing in MATLAB: https://www.mathworks.com/company/newsletters/articles/matrix-indexing-in-matlab.html

[Iftekharuddin Syed]

Thank you

[Iftekharuddin Syed]

How can I select 5 random value out 1000( from a matrix of size 12x1000), with each randomly selected value contains all the 12 rows from the original matrix. And store it into another matrix of size 12x5.

Can anyone help me with the code.