如何调整尺寸并将其保存为png格式? [英] How to resize and save plots in png format?

问题描述

我想绘制分位数回归的结果，但不能:

I would like to plot the results from a quantile regression, but am not able to:

1. 控制地块的尺寸/大小，并
2. 将图另存为png.

这是我的代码:

require(quantreg)
data(engel)
attach(engel)
xx <- income - mean(income)
zz <- c(120, diff(income))
fit1 <- summary(rq(foodexp~xx+zz, tau=2:98/100))

然后:

png('res.png')
plot(fit1, mfrow=c(1,2))

仅将zz绘图保存到res.png文件中.有什么方法可以将绘图保存到单独的文件中(两个和一个)? 以及如何控制图的宽度/高度?我喜欢将所有单个图保存到.png文件时都具有width = height(正方形)吗?

Only the zz plot is saved to the res.png file.. Is there any way I can save the plots in separate files (two and one)? and how do I control the width/height of the plots? I like all the individual plots to have width=height (square) when i save them to the .png file?

推荐答案

您可以通过png参数控制图像尺寸.

You can control the image dimensions by png argument.

png("image.png", width = 800, height = 600)
plot(...)
dev.off()

要修饰"图像，请使用dev.off.

To "finish" the image, use dev.off.

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