How can I select rows in an array based on the values in the first row of another array?

Hi suppose I have a column of values like :

How do I select every other row that are not displayed in the rows above in another new array. Example: I will want all other row 1,2,4,5..... excluding row 3, 39,51,15,28,65 and 56.

Please help, Thank you!

Answer 1

[Stephen23]

idx = setdiff(1:size(yourarray,1),yourvector)
out = yourarray(idx,:)

[tinkiewinkie]

worked well for my case! Thank you!