R中的数据操作:"X"必须是原子的 [英] Data Manipulation in R: 'X' must be atomic

问题描述

我已使用以下命令导入了标题和数字为多列的文件. irs_data <- read.csv(file="10incyallnoagi.csv")

I have imported a file with headings and numbers in multiple columns using the following command. irs_data <- read.csv(file="10incyallnoagi.csv")

我想将一列中的值除以另一列，然后确定最高的3个值.

I would like to divide the values in 1 column by another and then determine the highest 3 values.

     salary_var <- c(irs_data[13]/irs_data[12])
     head(sort(new_var, decreasing=TRUE), 3) 

我不断收到错误提示.作为 R 的初学者，在这种情况下，"x必须是原子的"是什么意思.

I keep getting the constant error. As a beginner to R, what does it mean "x must be atomic" in this context.

Error in sort.int(x, na.last = na.last, decreasing = decreasing, ...) : 
  'x' must be atomic

推荐答案

问题是salary_var是包含单个元素的列表.然后，对sort()的调用试图对列表进行排序，而不是对原子元素进行排序.通过运行str(salary_var)，您可以看到salary_var是列表.如果省略c()，则最终将得到一个只有一列的数据框，这也带来了同样的问题.

The problem is that salary_var is a list containing a single-element. The call to sort() is then trying to sort a list, not an atomic element. You can see that salary_var is a list by running str(salary_var). If you omit the c(), you'll instead end up with a data frame with a single column, which gives the same problem.

两个简单的解决方案:

要对列表元素中的值进行排序，请使用

To sort the values in the element of the list, use

head(sort(salary_var[[1]], decreasing=TRUE), 3) 

，其中[[1]]选择列表的第一个元素并对其中的值进行排序.

where the [[1]] selects the first element of the list and sorts the values within it.

或者，将salary_var显式创建为数字矢量:

Alternatively, create salary_var explicitly as a numeric vector instead:

salary_var <- (irs_data[13]/irs_data[12])[[1]]

一个注意事项:在您的帖子中，您在调用sort()时写了new_var而不是salary_var，这可能会使其他读者感到困惑.

One note: in your post, you wrote new_var instead of salary_var in your call to sort() which may confuse other readers.

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