r - multiple transform on df with plyr -


I have a DF and I look forward to many transform it with plyr:

  Idplot / idtree / species / condition / dbh_cm / h_m / hblc_m calcg & lt; - Change the function (DF) (df, g_m2 = exemplary * (dbh_cm ^ 2/40000) CalcHD & lt; - Function (DF) change (df, HD = H_m / dbh_cm)  

...

What can be done in a function? thanks a lot.

Yes, your assignment separated with commas:

  & Gt; Head (CH) Fertility Agriculture exam education Catholic Courtelary 80.2 17.0 15 12 9.96 Zurich 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 Cortalie 22.2 Delmont 22.2 French-Ment 20.2 Mutantier 20.3 Newwayville 20.6 Parentry 26.6 & gt; Head (transform (Swiss, Agriculture = agricultural ^ 2, Catholic = -Catholic)) Fertility Agriculture examination Catholic education Courtelary 80.2 289.00 15 12 -9.96 Zurich 83.1 2034.01 6 9 -84.84 Franches-Mnt 92.5 1576.09 5 -93.40 Moutier of 5 85.8 1332.25 12 7 -33.77 Neuveville 76.9 1892.25 17 15 -5.16 Porrentruy 76.1 1246.09 9 7 -90.57 Infant.Mortality Courtelary 22.2 Zurich 22.2 Franches-Mnt 20.2 Moutier 20.3 Neuveville 20.6 Porrentruy 26.6  
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