替换某个逻辑范围内的数据框中的值 [英] Replacing value in a data-frame within some logical range

问题描述

如何在某个逻辑范围内替换数据框中的值？

列名应为字符串。

How can i replace value from a dataframe within some logical range?.
Column name should be string.

selCoumn <- 'carb'
mtcars$selCoumn [mtcars$selCoumn  >= 1 & mtcars$selCoumn  <= 2] <- ">=1 & <=2"

i我得到以下错误。

i am getting the below error.

Error in `$<-.data.frame`(`*tmp*`, "<pre lang="C#">selCoumn&quot;, value=character(0)): 
  replacement has 0 rows, data has 38232 </pre>

推荐答案

selCoumn [mtcars

selCoumn [mtcars

selCoumn> = 1& ; mtcars

selCoumn >= 1 & mtcars

selCoumn< = 2]< - > = 1& < = 2

selCoumn <= 2] <- ">=1 & <=2"

i我收到以下错误。

i am getting the below error.

Error in `

中

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