Randomly select a column

n= 3*100 matrix

i want to select 20 non repeating random column

so, final matrix will be

x=3*20 ;

where 3 rows should be the corresponding column value of the original matrix

Any help would be really appreciated.

Thanks

[Torsten]

Why do you ask the same question again ?

https://de.mathworks.com/matlabcentral/answers/1733475-how-to-randomly-select-an-array-of-20-nonrepeating-values-from-another-array-which-has-100-values-wi#answer_978600?s_tid=prof_contriblnk

Here is (again) the answer:

x=n(:,sort(randperm(100,20)))

[Md Nazmul Hoque]

sorry for that bro, i'm kinda new.

i wanted the specific solution.

in the last one , i thought i couldn't explain it properly

thats why. anyway thank you for your support.

Answer 1

[Matt J]

x=n(:,randperm(100,20))

[Md Nazmul Hoque]

Thank you Bro.