如果有错误的状态我从未见过 [英] if statemtent with error I never seen

问题描述

我不明白这个错误：

Warning message:
In if ((t$carried2 == t$Dead5) & (t$carried2 == t$Dead6)) { :
  the condition has length > 1 and only the first element will be used

我的代码：

if ((t$carried2 == t$Dead5) & (t$carried2 == t$Dead6)) {(t$Dead5 = 0) & (t$Dead6 = 0)}

这可能很糟糕，但我是新手。无论如何，我想说是否（这个和那个发生）{那么这个和那个

This is probably crappy, but I am new. Anyways, I want to say if (this and that happen) {then this and that = 0

推荐答案

这个怎么样：

indices <- (t$carried2 == t$Dead5) & (t$carried2 == t$Dead6)

t$Dead5[indices] <- 0
t$Dead6[indices] <- 0

设置 t $ Dead5 和 t $的值Dead6 为零，在那些条件为 TRUE 的行中。

This sets the the values of t$Dead5 and t$Dead6 to zero, in those rows where the condition is TRUE.

你说在您的评论中，您要清理数据框。以下是删除 indices TRUE 的行的方法。使用指数，如上所述：

You say in your comment that you want to clean up the data frame. Here is how you remove the rows for which indices is TRUE. With indices as above:

t <- t[!indices,]

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