could anyone tell me how to modify the line without using randsample

code:

unused_rows=1:12;
N_UE_rows=2;
rows=unused_rows(randsample(length(unused_rows),N_UE_rows))

If i remove randsample in the above line such that rows=unused_rows(length(unused_rows),N_UE_rows) i am getting error

 Attempted to access unused_rows(12,2); index out of bounds because size(unused_rows)=[1,12].

could anyone help me to fix it.

[Rik]

Why do you want to remove randsample? How else do you want to select rows?

[Prabha Kumaresan]

if i am using randsample the number of rows keeps on changing for every run.But i want to keep the number of rows to be fixed for each run.

[Rik]

The number of rows is fixed. The specific rows are not. Is that what you want?

[Prabha Kumaresan]

the number of rows and the specific rows in the number of rows as well.

Answer 1

[Jan]

unused_rows = 1:12;
N_UE_rows   = 2;
rows        = unused_rows(randperm(length(unused_rows), N_UE_rows));

This chooses 2 random values from the vector unused_rows.

[Prabha Kumaresan]

if i use randperm only two random values are chosen. but what i actually need is i need to choose all the 12 values such that each group should contain 2.If i run the code next time the same value needs to be selected.

[Jan]

@Prabha: Your question was to write the code without randsample. Now you are asking a different question.

This creates a matrix containing the numbers 1 to 12, where the rows contains two different elements:

reshape(randperm(12), 6, 2)

When I see your other question https://www.mathworks.com/matlabcentral/answers/389430-could-anyone-help-me-how-to-fix-this-issue, it seems, like you want something else.

You have asked 188 questions already and the thread about "How to ask a good question" has been suggested repeatedly. Again: Please care for asking a clear question.