# Transformation of Several Variables in a Dataframe

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This is how I transform several columns of a dataframe, i.e., with count-data into binary coded data (this would apply also for any other conversion..).**theBioBucket***, and kindly contributed to R-bloggers]. (You can report issue about the content on this page here)Want to share your content on R-bloggers? click here if you have a blog, or here if you don't.

count1 <- count2 <- count3 <- count4 <- sample(c(rep(0, 10), 1:10)) some <- LETTERS[1:20] thing <- letters[1:20] mydf <- data.frame(count1, count2, count3, count4, some, thing) ids <- grep("count", names(mydf)) myfun <- function(x) {ifelse(x > 0, 1, 0)} mydf[, ids] <- lapply(mydf[, ids], myfun)

p.s.: Let me know if you know of a slicker way.

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