On May 11, 2010, at 10:44 PM, michael westphal wrote:
Hello:
I have a dataframe, where the first column in a month:
Month CATCHMENT_ med min max
1 Apr Alknda01 71.68080 11.9406600 196.2753
2 Apr Alknda02 69.44580 12.1065600 196.2753
3 Apr ArialKhan 39.89310 5.8598700 175.4433
4 Apr Arjun01 4.79652 0.0093336 55.7136
5 Apr Arjun02 4.79652 0.0093336 55.7136
6 Apr Arun01 52.42320 0.1571928 241.9566
7 Apr Arun02 31.05060 0.1738902 420.6930
8 Apr Atrai01 52.58640 2.2828830 190.8891
9 Apr Atrai02 51.98850 2.6499780 189.7872
10 Apr Babai01 27.55440 0.0332469 130.7787
I want to sort the rows by Month, not alphabetically, but in the
calendar order. Any suggestions?
?LETTERS # cuz that where month.abb is documented.
Perhaps:
dfrm$Month <- factor(dfrm$Month, levels=month.abb)
dfrm[ order(dfrm$Month), ]
--
David Winsemius, MD
West Hartford, CT
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