How to combine the values in a column of dataframe

Question

I have a dataframe with two column. I want to concatenate the values in a second column and return a string. How can I do this in R?

Answer 1

You can use paste with the appropriate delimiter. Here, I am using ''. You can specify it to -, _ or anything else.

 paste(df$Col2, collapse="")

If there are NAs you could use na.omit

 paste(na.omit(df$V2), collapse="")