how to replace all special characters with DOT (.) R

Question

Hi i Have data frame need to replace all special characters with "."

df
variabe
name:A-B c
name/A-B-c
name-A/B:c

i have tried 
df$variable =  gsub("-", ".", df$variable)
df$variable =  gsub(":", ".", df$variable)

.. Is there any function / modification to do in a single step

o/p
variabe
name.A.B.c
name.A.B.c
name.A.B.c

Thanks

Answer 1

我们可以使用[[:punct:]]来匹配任何标点字符并替换为.

gsub("[[:punct:]]+", ".", df$variabe)