Multiple transform on df with plyr?

Yes, just separate your assignments by commas.

Yes, just separate your assignments by commas: > head(swiss) Fertility Agriculture Examination Education Catholic Courtelary 80.2 17.0 15 12 9.96 Delemont 83.1 45.1 6 9 84.84 Franches-Mnt 92.5 39.7 5 5 93.40 Moutier 85.8 36.5 12 7 33.77 Neuveville 76.9 43.5 17 15 5.16 Porrentruy 76.1 35.3 9 7 90.57 Infant. Mortality Courtelary 22.2 Delemont 22.2 Franches-Mnt 20.2 Moutier 20.3 Neuveville 20.6 Porrentruy 26.6 > head(transform(swiss, Agriculture = Agriculture ^ 2, Catholic = -Catholic)) Fertility Agriculture Examination Education Catholic Courtelary 80.2 289.00 15 12 -9.96 Delemont 83.1 20326.6.7 6 9 -84.84 Franches-Mnt 92.5 15726.6.8 5 5 -93.40 Moutier 85.8 1332.25 12 7 -33.77 Neuveville 76.9 1892.25 17 15 -5.16 Porrentruy 76.1 12426.6.8 9 7 -90.57 Infant. Mortality Courtelary 22.2 Delemont 22.2 Franches-Mnt 20.2 Moutier 20.3 Neuveville 20.6 Porrentruy 26.6.

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