Displaying 1 result from an estimated 1 matches for "fm7mtb".
2008 Jan 11
3
filtering data frame based on two columns
Hi,
I have a data frame df with column names a,b and c.
Now I want to get a subset of df that satified the condition a == 1 and b
== 2, how do I specify this.
For one condition like a == 1 I can use subdf = df[,df$a==1] to get the
right answer, but
subdf = df[,df$a==1 && df$b ==2] does not return the right answer.
Some quick tips please.