Changing field values in Script

[#1]

Hi,

I am wondering how to change the values of data in a field, through the script editor.

I import data from a spreadsheet currently and one of the fields is 'Group RM' and has lets say 10 values in it:

1

2

3

4

5

6

7

8

9

10

However I want to reduce to 5 overall, so i am left with 1,2,3,4 and OLD. Can I do this?

Thanks,

Luke

[#2]

Thanks, Joe.

Regards,

MSK