ggplot2每个主要中断的次要中断的整数倍 [英] ggplot2 integer multiple of minor breaks per major break

问题描述

此答案显示了您如何可以指定次要休息的位置.在文档中，它说minor_breaks可以是一个函数.但是，这并不像我预期的那样将绘图限制作为输入，而将主要限制线的上下位置作为输入.

This answer shows how you can specify where the minor breaks should go. In the documentation it says that minor_breaks can be a function. This, however, takes as input the plot limits not, as I expected, the location of the major gridlines below and above.

制作一个可以让我返回(例如，每个专业4个未成年人)的脚本似乎并不简单.这是我想做的事情，因为我有一个脚本要在多个不同的数据集上使用.我事先不知道这些限制，因此我无法对其进行硬编码.我当然可以创建一个函数，该函数可以在绘制数据之前从数据集中获取所需的值，但这似乎有些过分.

It doesn't seem very simple to make a script that will return me, say, 4 minors per major. This is something I would like to do since I have a script that I want to use on multiple different datasets. I don't know the limits beforehand, so I can't hard code them in. I can of course create a function that gets the values I need from the dataset before plotting, but it seems overkill.

是否有一种通用的方法来说明每个主要休息的次要休息次数?

Is there a general way to state the number of minor breaks per major break?

推荐答案

我认为scales::extended_breaks是连续刻度的默认功能.您可以在此函数中设置中断次数，并使minor_breaks的数目为breaks的数目的整数倍.

I think scales::extended_breaks is the default function for a continuous scale. You can set the number of breaks in this function, and make the number of minor_breaks a integer multiple of the number of breaks.

library(ggplot2)
library(scales)
nminor <- 7
nmajor <- 5
ggplot(iris, aes(x = Species, y = Sepal.Length)) + 
  geom_point() +
  scale_y_continuous(breaks = extended_breaks(n = nmajor), minor_breaks = extended_breaks(n = nmajor * nminor) )

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