在R中添加图片以绘图 [英] Adding a picture to plot in R

问题描述

我正在尝试将图片(jpeg，png不在乎)添加到由布局功能定义的绘图中.例如:

I'm trying to add a picture (jpeg,png doesn't care) to a plot which is defined by the layout function. For example:

a<-c(1,2,3,4,5)

b<-c(2,4,8,16,32)

m <- matrix(c(1,1,1,1,2,3,2,3), nrow = 2, ncol = 4)

layout(m); hist(a);boxplot(a~b);plot(b~a)*

我要添加图像而不是位置1的直方图(在我的情况下，它是地图)

Instead of the histogram on position 1 I want to add an image (In my case it's a map)

我不知道如何处理jpeg包，也许您可​​以帮我！

I don't know how to deal with the jpeg package, maybe you can help me!

推荐答案

您需要通过png和jpeg包读取png或jpeg文件.然后，使用rasterImage功能可以在绘图上绘制图像.假设您的文件是myfile.jpeg，则可以尝试以下操作:

You need to read your png or jpeg file through the png and jpeg packages. Then, with the rasterImage function you can draw the image on a plot. Say that your file is myfile.jpeg, you can try this:

require(jpeg)
img<-readJPEG("myfile.jpeg")
#now open a plot window with coordinates
plot(1:10,ty="n")
#specify the position of the image through bottom-left and top-right coords
rasterImage(img,2,2,4,4)

上面的代码将在(2,2)和(4,4)点之间绘制图像.

The above code will draw the image between the (2,2) and (4,4) points.

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