Replace numbers in data frame column in R?

Question

Possible Duplicate:
Replace contents of factor column in R dataframe

I have the data.frame

df1<-data.frame("Sp1"=1:6,"Sp2"=7:12,"Sp3"=13:18)
rownames(df1)=c("A","B","C","D","E","F")

df1
  Sp1 Sp2 Sp3
A   1   7  13
B   2   8  14
C   3   9  15
D   4  10  16
E   5  11  17
F   6  12  18

I want to replace every entry of the number 8 in the column df1$Sp2 with the number 800. I have tried:

test<-replace(df1$Sp2,df1[800,"Sp2"],5)

For a better understanding of how to use `replace` see: http://stackoverflow.com/questions/11811027/replace-function-examples — Tyler Rinker, Aug 05 '12 at 14:56

score 65 · Answer 1 · answered Aug 05 '12 at 14:53

65

e.g.:

df1$Sp2[df1$Sp2 == 8] <- 800

answered Aug 05 '12 at 14:53

sgibb

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@Elizabeth, why not accept the answer! – Monica Heddneck Jul 01 '16 at 20:03
When testing this, my column gets turned into an integer, anyone else experiencing anything similar? – janeon Apr 25 '21 at 14:20

Replace numbers in data frame column in R?

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