dplyr更改许多数据类型 [英] dplyr change many data types

问题描述

更改数据类型我可以使用类似

to change data types I can use something like

l1 <- c("fac1","fac2","fac3")
l2 <- c("dbl1","dbl2","dbl3")
dat[,l1] <- lapply(dat[,l1], factor)
dat[,l2] <- lapply(dat[,l2], as.numeric)

与 dplyr

dat <- dat %>% mutate(
    fac1 = factor(fac1), fac2 = factor(fac2), fac3 = factor(fac3),
    dbl1 = as.numeric(dbl1), dbl2 = as.numeric(dbl2), dbl3 = as.numeric(dbl3)
)

是否有更优雅（更短）的方式dplyr？

is there a more elegant (shorter) way in dplyr?

thx
Christof

thx Christof

推荐答案

使用 mutate_each （这是 mutate_each _ ）的标准评估版本更改列类：

You can use the standard evaluation version of mutate_each (which is mutate_each_) to change the column classes:

dat %>% mutate_each_(funs(factor), l1) %>% mutate_each_(funs(as.numeric), l2)

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