Creating binary variable depending on strings of two dataframes
your question is not clear to me .. but your solution is a variation of
data1$x.1 <- data1$x1 %in% data2$y1
you can play with your conditions to get the result you want
On Tue, Dec 7, 2010 at 10:00 PM, Pete Pete <noxyport at gmail.com> wrote:
Hi,
consider the following two dataframes:
x1=c("232","3454","3455","342","13")
x2=c("1","1","1","0","0")
data1=data.frame(x1,x2)
y1=c("232","232","3454","3454","3455","342","13","13","13","13")
y2=c("E1","F3","F5","E1","E2","H4","F8","G3","E1","H2")
data2=data.frame(y1,y2)
I need a new column in dataframe data1 (x3), which is either 0 or 1
depending if the value "E1" in y2 of data2 is true while x1=y1. The result
of data1 should look like this:
? x1 ? ? x2 x3
1 232 ? 1 ? 1
2 3454 1 ? 1
3 3455 1 ? 0
4 342 ? 0 ? 0
5 13 ? ? 0 ? 1
I think a SQL command could help me but I am too inexperienced with it to
get there.
Thanks for your help!
--
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