Function for multiple statements

Question

I have the following code that I use to uniform the names into a dataframe (tb):

names(tb) = tolower(names(tb))
names(tb) = gsub("\\:", "", names(tb))
names(tb) = gsub("\\.", "_", names(tb))
names(tb) = gsub("\\-", "_", names(tb))
names(tb) = gsub("[[:space:]+]", "_", names(tb))

I need to apply those 5 strings to multiple dataframes, so I'd like to create a function for this. Can you help me please? Thanks!

Is there any specific reason you want to build your own function? Have you tried the function clean_names() from the package janitor? — Aramis7d
– Aramis7d, Commented Mar 13, 2019 at 17:47
We could make it more simple with chartr("[.- ]", "---", gsub(":", "", tolower(names(tb))))) — akrun
– akrun, Commented Mar 13, 2019 at 17:47

dylanjm · Accepted Answer · 2019-03-13 17:48:24Z

1

Pretty simple, just pass your dataframe to the function, change the names and then return the changed dataframe.

name_change <- function(tb) {

names(tb) = tolower(names(tb))
names(tb) = gsub("\\:", "", names(tb))
names(tb) = gsub("\\.", "_", names(tb))
names(tb) = gsub("\\-", "_", names(tb))
names(tb) = gsub("[[:space:]+]", "_", names(tb))
return tb

}

answered Mar 13, 2019 at 17:48

dylanjm

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2 Comments

NelsonGon Over a year ago

This is pretty hard-coded and might be less efficient.

dylanjm Over a year ago

@NelsonGon it's not hardcoded at all? It takes the names of a dataframe.

akrun · Accepted Answer · 2019-03-13 17:56:00Z

1

It can be simplified in a function with

f1 <- function(v1) {
     gsub("[. -]+", "_", gsub(":", "", tolower(v1)))
  }

or using chartr

f2 <- function(v1) {
    chartr(". -", "___", gsub(":", "", tolower(v1)))
 }

f1(str1)
#[1] "hellos1_s2_s3_s4"

f2(str1)
#[1] "hellos1_s2_s3_s4"

data

str1 <- "hello:s1.s2-s3 s4"

edited Mar 13, 2019 at 17:56

answered Mar 13, 2019 at 17:48

akrun

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