CODEWITHSUNDEEP
rlistdataframelapply
vagabond
vagabond

Reputation: 3594

saving lapply results to the list over which function applied

In the spirit of "no question is too simple" , how do I save the output of an lapply function to the list on which it was applied. For e.g. I am doing

lapply(listofdf, function(x) as.numeric(gsub("[$,]", "", x[ ,18])))

where x is data frame and gsub is applied to 18th column. I want to save the result to the 18th column in the listofdf itself. I've never worked with lists. with a data frame we would simply do df$whatever <- function(df$whatever, .... ) . With a list how would this work?

Upvotes: 1

Views: 2185

Answers (1)

akrun
akrun

Reputation: 886938

You could do

listofdf <- lapply(listofdf, function(x){
                        x[,18] <- as.numeric(gsub("[$,]", "", x[ ,18])) 
                        #assign 18th column to the modified column 
                        x #return the dataframe
                       })

Upvotes: 4

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