将绘图文本/二进制写入变量 [英] Write Plot Text/Binary into Variable

问题描述

有没有办法让 R 设备(postscript 会很棒)将输出写入变量而不是文件?

Is there a way to have an R Device (postscript would be great) write the output into a variable instead of a file?

例如我知道:

postscript(file="|cat")
plot(1:10)
dev.off()

将 postscript 文本发送到 STDOUT.如何将该文本放入 R 中的变量中?

Will send the postscript text to STDOUT. How can I get that text into a variable within R?

推荐答案

我已经成功地将图的二进制作为字符串转换为 R 变量.它有一些读/写开销.在下面的代码段中，R 将绘图保存为临时文件并将其读回.

I've had success in getting the Binary of a plot into an R variable as a string. Its got some read/write overhead. In the snippet below, R saves the plot as a temp file and reads it back in.

## create a plot
x <- rnorm(100,0,1)
hist(x, col="light blue")

## save plot as temp file
png(filename="temp.png", width=500, height=500)
print(p)
dev.off()

## read temp file as a binary string
plot_binary <- paste(readBin("temp.png", what="raw", n=1e6), collapse="")

也许这对你有帮助.

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