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问题描述

如何检查两个物件,例如数据帧,在R中的值相等

How do I check if two objects, e.g. dataframes, are value equal in R?

通过值相等,我的意思是一个数据帧的每一列的每一行的值等于相应行的值, 。

By value equal, I mean the value of each row of each column of one dataframe is equal to the value of the corresponding row and column in the second dataframe.

推荐答案

不清楚测试两个数据帧是否为值相等以测试值是否相同,这里是具有相等值的两个不相同的数据帧的示例:

It is not clear what it means to test if two data frames are "value equal" but to test if the values are the same, here is an example of two non-identical dataframes with equal values:

a <- data.frame(x = 1:10)
b <- data.frame(y = 1:10)

要测试所有值是否相等:

To test if all values are equal:

all(a == b) # TRUE

b
$ b

To test if objects are identical (they are not, they have different column names):

identical(a,b) # FALSE: class, colnames, rownames must all match.

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05-23 16:38