-----Original Message-----
From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-
project.org] On Behalf Of Diogenas
Sent: Thursday, December 02, 2010 12:09 PM
To: r-help at r-project.org
Subject: [R] Filter data
Hello,
I understand that question is probably stupid, but ...
I have data (polity IV index)
"country","year","democ","autoc","polity","polity2"
"1","Afghanistan ",1800,1,7,-6,-6
"2","Afghanistan ",1801,1,7,-6,-6
"3","Afghanistan ",1802,1,7,-6,-6
I need to create new data sets which includes only cases after year
1995.
I've tried this command:
poli2<-poli[poli$year > 1994,] ,
however it generated this:
Error in poli[poli$year > 1994, ] : incorrect number of dimensions.
Any ideas how i can overcome this?