Remove special characters from data frame

Question

I have a matrix that contains the string \"Energy per �m\". Before the \'m\' is a diamond shaped symbol with a question mark in it - I don\'t know what it is.

I ha

Answer 1

There is probably a better way to do this than with regex (e.g. by changing the Encoding).

But here is your regex solution:

gsub("[^0-9A-Za-z///' ]", "", a)
[1] "Energy per m"

But, as pointed out by @JoshuaUlrich, you're better off to use:

gsub("[^[:alnum:]///' ]", "", x)
[1] "Energy per m"