在PDF输出中自动调整R绘图大小 [英] automatically adjust R plot size in a PDF output

问题描述

在R中使用pdf()函数将图保存到外部文件中时，我们可以指定width和/或height来调整图的大小.但是，在某些情况下，我们会获得多个绘图(例如使用par(mfrow=c(2,4))).在这种情况下，要正确显示所有图，很难确定PDF文件的最佳width和height是什么.有没有办法让R自动拟合图"在PDF文件中?我在pdf()中搜索了参数并尝试了一些，但结果并不令人满意.非常感谢你！

When using the pdf() function in R for saving a plot in an external file, we can specify width and/or height to adjust the size of the plot. However, there are situations when we obtain multiple plot (say using par(mfrow=c(2,4))). In this situation, it's kind of difficult to determine what is the best width and height for the PDF file in order to have all plots displayed properly. Is there a way to let R automatically "fit the plots" in the PDF file? I searched the arguments in pdf() and tried some, but the results are not satisfactory. Thank you very much!

推荐答案

使用ggplot怎么样?

How about something using ggplot?

require(ggplot2)

# Bogus data
x <- rnorm(10000)
y <- as.factor(round(rnorm(10000, mean=10, sd=2), 0))
df <- data.frame(vals=x, factors=y)

myplot <- ggplot(data=df, aes(x=vals)) +
  geom_density() +
  facet_wrap(~ factors)

ggsave(filename="~/foo.pdf", plot=myplot, width=8, height=10, units="in")

编辑:如果您需要打印多页，请参见

Should you need to print over multiple pages, see this question.

这篇关于在PDF输出中自动调整R绘图大小的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！