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R 众数


众数

众数是指在数据集中出现次数最多的值。

R 没有计算众数的函数。但是,我们可以创建自己的函数来找到它。

如果我们查看wt变量(来自mtcars数据集)的值,我们会发现数字3.440经常出现。

wt(重量)的排序观测值

1.513 1.615 1.835 1.935 2.140 2.200 2.320 2.465
2.620 2.770 2.780 2.875 3.150 3.170 3.190 3.215
3.435 3.440 3.440 3.440 3.460 3.520 3.570 3.570
3.730 3.780 3.840 3.845 4.070 5.250 5.345 5.424

我们可以使用以下代码来查找众数,而不是手动计数。

示例

Data_Cars <- mtcars

names(sort(-table(Data_Cars$wt)))[1]

结果

[1] "3.44"
自己尝试 »

从上面的示例中,我们现在知道在mtcars wt变量中出现次数最多的数字是3.443.440磅



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