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

Hi suppose I have a column of values like :

How do I select rows in another array based on the array above, Example: row 46, 47 ,48, 49 .... except for row 52

Answer 1

[Ridwan Alam]

new_array = second_array(first_array,:)

[tinkiewinkie]

Thank you! Worked well!