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vehtype
2009 Jan 26
1
reshape problem: id and variable names not being recognized
Hi everyone. Long time listener, first-time caller here.
I have a data set that's been melted with the excellent reshape package, but
I can't seem to cast it the way I need to.
Here's the melted data's structure:
> str(mdat)
'data.frame': 6978 obs. of 4 variables:
$ VehType : Factor w/ 2 levels "Car","Truck": 1 1 2 1 1 2 1 1 1 1 ...
$ Year : Factor w/ 6 levels "2003","2004",..: 5 1 5 6 6 2 2 3 2 5 ...
$ variable: Factor w/ 1 level "mpg": 1 1 1 1 1 1 1 1 1 1 ...
$ value : num 22.4 21.5 22.6 22.4 25 ...
For the p...