I have read an CSV file from a questionnaire with many non-numeric, nominal values, e.g, country codes, computer skills (Expert, Intermediate, Beginner), â€¦ via read.csv
I want to have the percentages of each answer for each questions, i.e. , similar to a frequency table given by summary, sorted by occurrences from high to low. Later, I also want to do cross-tabulation, e.g., country with computer skills.
`summary(data)` gives me almost what I want, i.e. it gives me a frequency table of the answers, but the frequencies are
1. Not ordered by frequency but by variable
2. Are not percentages.
`prop.table` should give percentage tables, but it works only with numeric values.
Is there any easy way? Which function can I use?
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