更改绘图轴上刻度线的间距? [英] Change the spacing of tick marks on the axis of a plot?

问题描述

如何更改绘图轴上刻度线的间距?

How can I change the spacing of tick marks on the axis of a plot?

我应该在基本图或rgl中使用哪些参数?

What parameters should I use with base plot or with rgl?

推荐答案

在基础图中至少有两种方法可以实现此目的(我的示例适用于x轴，但工作原理相同y轴):

There are at least two ways for achieving this in base graph (my examples are for the x-axis, but work the same for the y-axis):

1. 使用par(xaxp = c(x1, x2, n))或plot(..., xaxp = c(x1, x2, n))定义极限刻度线的位置(x1& x2)和刻度线之间的间隔数(n).因此，n+1是绘制的刻度线的数量. (这仅在不使用对数标度的情况下有效，有关具有对数标度的行为，请参见?par.)

1. Use par(xaxp = c(x1, x2, n)) or plot(..., xaxp = c(x1, x2, n)) to define the position (x1 & x2) of the extreme tick marks and the number of intervals between the tick marks (n). Accordingly, n+1 is the number of tick marks drawn. (This works only if you use no logarithmic scale, for the behavior with logarithmic scales see ?par.)

您可以完全隐藏轴的绘制，以后再使用axis()添加刻度线.
要抑制轴的绘制，请使用plot(... , xaxt = "n").
然后用side，at和labels调用axis():axis(side = 1, at = v1, labels = v2).在side指向轴的侧面(1 = x轴，2 = y轴)的情况下，v1是包含刻度线位置的矢量(例如，c(1, 3, 5)，如果您的轴的范围是从0到6，您需要三个标记)，以及v2一个包含指定刻度线标签的向量(必须与v1相同，例如，c("group a", "group b", "group c")).参见?axis和

You can suppress the drawing of the axis altogether and add the tick marks later with axis().
To suppress the drawing of the axis use plot(... , xaxt = "n").
Then call axis() with side, at, and labels: axis(side = 1, at = v1, labels = v2). With side referring to the side of the axis (1 = x-axis, 2 = y-axis), v1 being a vector containing the position of the ticks (e.g., c(1, 3, 5) if your axis ranges from 0 to 6 and you want three marks), and v2 a vector containing the labels for the specified tick marks (must be of same length as v1, e.g., c("group a", "group b", "group c")). See ?axis and my updated answer to a post on stats.stackexchange for an example of this method.

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