从R中的直方图获取频率值 [英] Getting frequency values from histogram in R

问题描述

我知道如何绘制直方图或其他与频率/百分比相关的表格. 但现在我想知道，如何在事实发生后在表格中获得这些频率值.

I know how to draw histograms or other frequency/percentage related tables. But now I want to know, how can I get those frequency values in a table to use after the fact.

我有一个庞大的数据集，现在我绘制了一个设置了binwidth的直方图.我想提取与每个binwidth对应的频率值(即y轴上的值)并将其保存在某处.

I have a massive dataset, now I draw a histogram with a set binwidth. I want to extract the frequency value (i.e. value on y-axis) that corresponds to each binwidth and save it somewhere.

有人可以帮我吗? 谢谢！

Can someone please help me with this? Thank you!

推荐答案

hist函数具有返回值(类histogram的对象):

The hist function has a return value (an object of class histogram):

R> res <- hist(rnorm(100))
R> res
$breaks
[1] -4 -3 -2 -1  0  1  2  3  4

$counts
[1]  1  2 17 27 34 16  2  1

$intensities
[1] 0.01 0.02 0.17 0.27 0.34 0.16 0.02 0.01

$density
[1] 0.01 0.02 0.17 0.27 0.34 0.16 0.02 0.01

$mids
[1] -3.5 -2.5 -1.5 -0.5  0.5  1.5  2.5  3.5

$xname
[1] "rnorm(100)"

$equidist
[1] TRUE

attr(,"class")
[1] "histogram"

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