as.numeric with comma decimal separators?

Question

I have a large vector of strings of the form:

Input = c(\"1,223\", \"12,232\", \"23,0\")

etc. That\'s to say, decimals separated by commas,

Answer 1

The answer by adibender does not work when there are multiple commas.

In that case the suggestion from use554546 and answer from Deena can be used.

Input = c("1,223,765", "122,325,000", "23,054")
as.numeric(gsub("," ,"", Input))

ouput:

[1] 1223765 122325000 23054

The function gsub replaces all occurances. The function sub replaces only the first.