[R] substitute values

From: Sergio Della Franca <sergio.della.franca_at_gmail.com>
Date: Mon 02 Apr 2007 - 11:31:08 GMT


Dear R-Helpers,

I have the following data set(y):

Years Products

1          10
2          25
3          40
4          NA
5          35

<NA> 23
6 NA 7 67 8 NA

I want to create a new column into my dataset(y) under the following conditions:
if years =NA and products >20 then new column=1 else new column=0; to obtain the following results:

Years Products New Column

1          10          0
2          25          0
3          40          0
4          NA         0
5          35          0

<NA> 23 1
6 NA 0 7 67 0 8 NA 0

Thank you in advance.

Serigo Della Franca

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