Converting Big 5 questionnaire data to Big 5 scores using R
Here are some resources that will show you how to score the Big 5 using R.

The main function that I like is called scoreItems in the psych package. It handles item reversal, imputation, and multiple scales. It will also give you things like alphas and item total correlations.

William Revelle has this tutorial:
http://personality-project.org/r/psych/HowTo/scoring.pdf

I have this video ( which has an associated github repository):
https://www.youtube.com/watch?v=iFFW5sK3Bhk

See in particular, this bit of the code: https://github.com/jeromyanglim/score-tests-with-r-exercise/blob/master/finished-analysis/munge/01-munge.R

sc &lt;- scoreItems(meta.bfi[,v$scales], ccases[,meta.bfi$name])
ccases[,colnames(sc$scores)] &lt;- sc$scores