On Mar 3, 2010, at 9:04 AM, Newbie19_02 wrote:
Thanks again for the help but what I am having trouble with is that
I get:
1012 CAO0103166 01/04/1999 I200
1016 CAO0103166 03/05/2000 I200
1024 CAO0103166 20/06/1997 I209
1025 CAO0103166 25/02/1999 I209
1027 CAO0103166 27/08/1999 I200
1058 CAO0107171 11/01/2002 N411
1104 CAO0113512 14/02/2003 I209
Use the "^' (caret) to represent the beginning of a string.
> tdt[grepl("^410*|^I25*", tdt$main_condition), ]
ID PROCHI Date_admission main_condition
2 28394 CAO3121534 18/04/1999 I251
3 28395 CAO3121534 18/10/1993 4109
5 28397 CAO3121534 20/04/1999 I251
6 28398 CAO3121534 21/04/1999 I251
8 28400 CAO3121534 21/10/1993 4109
13 28405 CAO3121534 30/09/1997 I259
Or:
> subset(tdt, grepl("^410*|^I25*",main_condition))
ID PROCHI Date_admission main_condition
2 28394 CAO3121534 18/04/1999 I251
3 28395 CAO3121534 18/10/1993 4109
5 28397 CAO3121534 20/04/1999 I251
6 28398 CAO3121534 21/04/1999 I251
8 28400 CAO3121534 21/10/1993 4109
13 28405 CAO3121534 30/09/1997 I259
I'm trying to avoid getting N411?
Thanks,
Natalie
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