如何修复ggplot中的纵横比? [英] How to fix the aspect ratio in ggplot?

问题描述

我正在尝试调整绘图的大小以适合我的文档，但我很难让绘制的图表成为正方形.

I'm trying to resize a plot to fit into my document, but I'm having difficulties getting the plotted diagram do be a square.

示例:

pdf(file = "./out.pdf", width = 5, height = 5)
p <- ggplot(mydata, aes(x = col1, y = col2))
print(p)
aux <- dev.off()

尽管 x 和 y 的限制相同，但结果中的图不是方形的.我猜 R 使封闭面板为 5x5"，但并不关心实际图表大小.

Although the limits for x and y are the same, the plot in the result isn't square. I guess that R makes the enclosing panel 5x5" but doesn't care about the actual diagram size.

我如何取消压缩我的图表?

推荐答案

在 ggplot 中，保持情节纵横比的机制是添加一个 coord_fixed()图层到情节.无论实际边界框的形状如何，这都将保留绘图本身的纵横比.

In ggplot the mechanism to preserve the aspect ratio of your plot is to add a coord_fixed() layer to the plot. This will preserve the aspect ratio of the plot itself, regardless of the shape of the actual bounding box.

(我还建议您使用 ggsave 将结果图保存到 pdf/png/etc，而不是 pdf(); print(p); dev.off() 序列.)

(I also suggest you use ggsave to save your resulting plot to pdf/png/etc, rather than the pdf(); print(p); dev.off() sequence.)

library(ggplot2)
df <- data.frame(
    x = runif(100, 0, 5),
    y = runif(100, 0, 5))

ggplot(df, aes(x=x, y=y)) + geom_point() + coord_fixed()

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