在 R 中构建直方图

Question

下午好。最近我遇到了在 R 中构建直方图的问题。我输入： Hist_SP500hist<-hist(SP500logreturns,col="lightblue",breaks = 140, border="white",main="", xlab="Time",xlim=c(-0.001,0.001))

这里我指定，中断数=140。但是当我输入 Hist_SP500hist$breaks 时，我得到 179 次休息。怎么会这样？

Answer 1

如果将其保存到对象，您可以手动调整 hist 中的中断。这是使用 faithful 数据集

的示例

注意：我没有足够的声誉来显示代码生成的图表

waiting.hist <- hist(faithful$waiting)

编辑：由于中断不会改变计数，因此您也必须更新计数。否则计数将被回收

waiting.hist$breaks <- seq(40, 100, 2.5)
waiting.hist$counts <- table(cut(faithful$waiting, seq(40, 100, 2.5)))

plot(waiting.hist)

或者您可以使用 ggplot2 并使用 bins 或 binwidth

指定中断

library(tidyverse)
#> Warning: package 'tidyverse' was built under R version 3.6.3
#> Warning: package 'ggplot2' was built under R version 3.6.3
#> Warning: package 'tibble' was built under R version 3.6.3
#> Warning: package 'tidyr' was built under R version 3.6.3
#> Warning: package 'purrr' was built under R version 3.6.3
#> Warning: package 'dplyr' was built under R version 3.6.3
#> Warning: package 'forcats' was built under R version 3.6.3

faithful %>% 
  ggplot(aes(x = waiting)) + 
  geom_histogram(bins = 30)


faithful %>% 
  ggplot(aes(x = waiting)) + 
  geom_histogram(binwidth = 2.5)

^{由 reprex package (v0.3.0)}

于 2020-09-05 创建

在 R 中构建直方图

Building a histogram in R

r

histogram