converting sequence numbers to odd numbers

[Mahdie Raj]

Hi,
I was wondering to know how can I convert sequence numbers to odd numbers in stata. I have a dataset which has a column containing sequence numbers (1,2,3,4,5, ...). I wanna convert it to 1, 3, 5, etc. (1 to 1, 2 to 3, 3 to 5, 4 to 7, etc).
Thanks,
Nader

[Nick Cox]

For column read variable. Otherwise school mathematics helps:

replace whatever = 2 * whatever - 1