r - replace string in dataframe -


i'm trying replace string in large data.frame. found following solution gsub doesn't preserve original data.frame layout. how can achieve this.

i mean want replace string , don't want change layout of df.

consider example:

test<-data.frame(a=c("a","b","c","d"),b=c("a","e","g","h"),c=c("i","j","k","a")) gsub("a","new",test)

thx

you want lapply through data.frame testing character or factor entries , applying gsub appropriately. result list, as.data.frame fixes this.

test$val <- 1:4 # non character/factor variable (test2 <- as.data.frame(lapply(test,function(x) if(is.character(x)|is.factor(x)) gsub("a","new",x) else x)))       b   c val 1 new new     1 2   b   e   j   2 3   c   g   k   3 4   d   h new   4 class(test2$val) # see if unchanged [1] "integer"

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