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July 26, 2017 16:42
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simple function to return the column name with the max (or min) value from a comparison of columns.
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| data(mtcars) | |
| col_compare<-function(df,cols,fun=which.max){ | |
| x<-data.frame(df) | |
| temp<-x[,c(cols)] | |
| wins<-colnames(temp)[apply(temp,1,fun)] | |
| return(wins) | |
| } | |
| mtcars$max<-col_compare(mtcars,3:5) |
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