replace certain elements in data frame

Hi Yosub,

if "dat" is your data frame, try something like (untested):

dat$code[!dat$code %in% c("8210", "8310", "9190")] <- "others"

the general idea being create a logical vector of codes that match the
three you want, use "!" to negate this (so you are getting all codes
NOT in the ones you want), and then use this to selectively assign
"others".

For documentation, see

?match
?Logic

Hope this helps,

Josh

Hello,

I have a data frame with 2 columns: year and code. In code column, I want to
replace elements that are not "8210", "8310", or "9190" with "others".

--
Sincerely,
Yosub Jung.

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Joshua Wiley
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University of California, Los Angeles
http://www.joshuawiley.com/

Hey,

Try the following code:

a=c(1,2,3,4,5)
b=c(10,20,30,40,50)
c=c(100,200,300,400,500)
d=c(1000,8210,9000,8310, 7000)
e=c(5555,6666,9190,7777,3333)
to.replace=c(8210,8310,9190)

df = data.frame(a,b,c,d,e)
xdf  <- apply(df, 2, function(x) x %in% to.replace)
df[xdf] <- "others"

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