assigning a string to an object without double quotes

Question

I have a string that is built programmatically

 tot=~item1+item2+item3+item4+item5+item6+item7+item8+item9+item10

that I need to wrap in two si

Answer 1

I think you are misunderstanding R string syntax. The string you described is:

# this is what I want
mod <- '
    tot=~item1+item2+item3+item4+item5+item6+item7+item8+item9+item10
'

That is exactly the same as writing:

mod <- '\ntot=~item1+item2+item3+item4+item5+item6+item7+item8+item9+item10\n'

or

mod <- "\ntot=~item1+item2+item3+item4+item5+item6+item7+item8+item9+item10\n"

Therefore, for your problem I think it would be sufficient to run:

string <- "tot=~item1+item2+item3+item4+item5+item6+item7+item8+item9+item10"
mod <- paste0("\n", string, "\n")

If you want to output your final model without the enclosing quotes, you can do:

cat(mod)
# 
# tot=~item1+item2+item3+item4+item5+item6+item7+item8+item9+item10