Created
July 3, 2014 11:37
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Remove unused factor levels in a data frame
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| dropall <- function(x){ | |
| isFac = NULL | |
| for (i in 1:dim(x)[2]){isFac[i] = is.factor(x[ , i])} | |
| for (i in 1:length(isFac)){ | |
| x[, i] = x[, i][ , drop = TRUE] | |
| } | |
| return(x) | |
| } |
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