一步将因子转换为逻辑

Question

是否可以X使用 data.table 的“就地”方法一步将我的因子列转换为逻辑列？

myDT <- data.table(X = factor(c("true", "false")))
str(myDT)

myDT[, X := as.logical(X)] # does not work

myDT[, X := as.logical(as.character(X))] # does not work either

# but this does
myDT[, X := as.character(X)]
myDT[, X := as.logical(X)]
str(myDT)

Answer 1

更新您的data.table安装；这是一个bug，从1.9.8版本开始修复，现在factors可以直接转换为logicals。

\n\n

library(data.table)\nmyDT[, X:= X=="true"]\nstr(myDT)\n#Classes \xe2\x80\x98data.table\xe2\x80\x99 and \'data.frame\':  2 obs. of  1 variable:\n# $ X: logi  TRUE FALSE\n

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