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Alex Rivera
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I have a data.frame that looks like Year Crustaceans Cod Tuna Herring Scorpion.fishes 1 1950 58578630 2716706 69690537 87161396 15250015 2 1951 59194582 3861166 34829755 51215349 15454659 3 1952 47562941 4396174 31061481 13962479 12541484 4 1953 68432658 3901176 23225423 13229061 9524564 5 1954 64395489 4412721 20798126 25285539 9890656 6 1955 76111004 4774045 13992697 18910756 8446391 With several more species (columns), and years running from 1950 to 2006. I'd like to explore it with ggplot2 (which I'm just learning). Do I need to transform this data so that the species is a factor to effectively use ggplot2 on this data? If not, how do I avoid having to create a layer for each species individually? If yes, (or really in either case) a quick pointer on using reshape or plyr to turn column names into a factor would be much appreciated.
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