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enquette
2005 Apr 20
6
Histogram
Dear everybody!
I am analysing data from an enquette. The answers are either A or B. How can I
draw a histogram without transforming the data from characters to numbers? If
the data are saved in a list M, hist(M[,1]) returns:
Error in hist.default(M[, 1]) : `x' must be numeric
Execution halted
Thank you in advance!