Dear group,
I need to modify some characters in a data frame. I want to use gsub and the
regex functionalities to do this.
Here is the data frame (df):
DESCRIPTION prix quantity
1 CORN Jul/10 -1.5 0
2 CORN May/10 -1082.0 -3
3 ROBUSTA COFFEE (10) Jul/10 11084.0 8
4 SOYBEANS Jul/10 1983.5 2
5 SPCL HIGH GRADE ZINC USD Jul/10 -2464.0 -1
6 STANDARD LEAD USD Aug/10 -118.0 0
For each df$DESCRIPTION element containing "USD" I want to remove the last
part of it(i.e Jul/10, or Aug/10...).
I was thinking of something like that:
>Df$DESCRIPTION<-gsub("USD","new name whithout last part",df$DESCRIPTION)
to get this following result:
DESCRIPTION prix quantity
1 CORN Jul/10 -1.5 0
2 CORN May/10 -1082.0 -3
3 ROBUSTA COFFEE (10) Jul/10 11084.0 8
4 SOYBEANS Jul/10 1983.5 2
5 SPCL HIGH GRADE ZINC USD -2464.0 -1
6 STANDARD LEAD USD -118.0 0
My problem is that I have no idea how to write the regular expression in my
command line.
Any help would be appreciated.
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