如何控制刻面ggplot2图的纵横比和比例? [英] How to control aspect ratios and scales of facetted ggplot2 plots?

问题描述

我想使用ggplot2在单列的行中绘制三个图，如下所示.

I want to facet three plots in rows of a single column using ggplot2, as illustrated below.

library(ggplot2)    
df <- data.frame(x=rep(1,3), y=rep(1,3), z=factor(letters[1:3]))
p <- ggplot(df, aes(x, y)) + geom_point() + facet_grid(z ~ .)
p

此输出有两个问题.最重要的是，我想控制x和y轴的比例，在这种情况下要使它们相同，即单个单位在x和y轴上应测量相同的距离.

There are two problems with this output. Most importantly, I want to control the scales of the x and y axes, in this case to make them the same i.e. a single unit should measure the same distance on both x and y axes.

第二个问题是多面图的y轴碰撞标签.解决这个问题的要点是奖励，但要充分考虑比例/长宽比的问题.

The second issue is the colliding lables for y axis of the facetted plots. Bonus points for solving that, but full credit for the scale/aspect ratio problem.

推荐答案

我认为您正在寻找 coord_fixed

library(ggplot2)    
df <- data.frame(x=rep(1,3), y=rep(1,3), z=factor(letters[1:3]))
p <- ggplot(df, aes(x, y)) + geom_point() + facet_grid(z ~ .)
p + coord_fixed(ratio=1)

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