R: convert list of numbers from character to numeric

Question

I have a column in my dataframe where in every cell there are one or more numbers. If there are many numbers, they are seperated with a space. Furthermore, R considers them as a

Answer 1

Following my comment, here is a solution using sapply :

sum(as.numeric(strsplit("6 310 21 20 64",' ')[[1]]))

which for the column of the dataframe will give something like this:

sapply(1:nrow(df),function(x){sum(as.numeric(strsplit(str1,' ')[[x]]))})
# 421 421 421

which could be improved in sapply(strsplit(str1,' '), function(x) sum(type.convert(x))), thanks to David Arenburg's suggestion.