djhurio djhurio - 4 months ago 20
R Question

Read a UTF-8 text file with BOM

I have a text file with Byte order mark (U+FEFF) at the beginning. I am trying to read the file in R. Is it possible to avoid the Byte order mark?

The function

(from the
package) reads the file, but adds
at the beginning of the first variable name:

> names(frame_pers)[1]
[1] "ļ»æreg_date"

The same is with

Currently I have made a function which removes the BOM from the first column name, but I believe there should be a way how to automatically strip the BOM.

remove.BOM <- function(x) setnames(x, 1, substring(names(x)[1], 4))

> names(frame_pers)[1]
[1] "ļ»æreg_date"
> remove.BOM(frame_pers)
> names(frame_pers)[1]
[1] "reg_date"

I am using the native encoding for the R session:

> options("encoding" = "")
> options("encoding")
[1] ""


Have you tried read.csv(..., fileEncoding = "UTF-8-BOM")?. ?file says:

As from R 3.0.0 the encoding ‘"UTF-8-BOM"’ is accepted and will remove a Byte Order Mark if present (which it often is for files and webpages generated by Microsoft applications).