R 画图保存为文件

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pdf("h20.pdf",width =6,height = 5 )

plot ...

dev.off()

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第一种png格式
png(file="myplot.png", bg="transparent")
画图程序
dev.off()

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第二种jpeg格式
jpeg(file="myplot.jpeg")
画图程序
dev.off()
文件都放在getwd()里了

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第三种pdf格式
pdf(file="myplot.pdf")
画图程序
dev.off()

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下面是一个具体的例子
png(file="myplot.png", bg="transparent")
plot(1:10)
rect(1, 5, 3, 7, col="white")
dev.off()
所有文件都放在getwd()里面了，你只需输入
getwd()
就可以看到文件所在位置

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Description

Graphics devices for BMP, JPEG, PNG and TIFF format bitmap files.

Usage

bmp(filename = "Rplot%03d.bmp",
    width = 480, height = 480, units = "px", pointsize = 12,
    bg = "white", res = NA, family = "", restoreConsole = TRUE,
    type = c("windows", "cairo"), antialias)

jpeg(filename = "Rplot%03d.jpg",
     width = 480, height = 480, units = "px", pointsize = 12,
     quality = 75,
     bg = "white", res = NA, family = "", restoreConsole = TRUE,
     type = c("windows", "cairo"), antialias)

png(filename = "Rplot%03d.png",
    width = 480, height = 480, units = "px", pointsize = 12,
    bg = "white", res = NA, family = "", restoreConsole = TRUE,
    type = c("windows", "cairo", "cairo-png"), antialias)

tiff(filename = "Rplot%03d.tif",
     width = 480, height = 480, units = "px", pointsize = 12,
     compression = c("none", "rle", "lzw", "jpeg", "zip", "lzw+p", "zip+p"),
     bg = "white", res = NA, family = "", restoreConsole = TRUE,
     type = c("windows", "cairo"), antialias)

Arguments

`filename`	the name of the output file, up to 511 characters. The page number is substituted if a C integer format is included in the character string, as in the default, and tilde-expansion is performed (see `path.expand`). (The result must be less than 600 characters long. See `postscript` for further details.)
`width`	the width of the device.
`height`	the height of the device.
`units`	The units in which `height` and `width` are given. Can be `px` (pixels, the default), `in` (inches), `cm` or `mm`.
`pointsize`	the default pointsize of plotted text, interpreted as big points (1/72 inch) at `res` ppi.
`bg`	the initial background colour: can be overridden by setting par("bg").
`quality`	the ‘quality’ of the JPEG image, as a percentage. Smaller values will give more compression but also more degradation of the image.
`compression`	the type of compression to be used.
`res`	The nominal resolution in ppi which will be recorded in the bitmap file, if a positive integer. Also used for units other than the default. If not specified, taken as 72 ppi to set the size of text and line widths.
`family`	A length-one character vector specifying the default font family. The default means to use the font numbers on the Windows GDI versions and `"sans"` on the cairographics versions.
`restoreConsole`	See the ‘Details’ section of `windows`. For `type == "windows"` only.
`type`	Should be plotting be done using Windows GDI or cairographics?
`antialias`	Length-one character vector. For allowed values and their effect on fonts with `type = "windows"` see `windows`: for that type if the argument is missing the default is taken from `windows.options()$bitmap.aa.win`. For allowed values and their effect (on fonts and lines, but not fills) with `type = "cairo"` see `svg`.

REF

https://blog.csdn.net/fengziyun/article/details/7757779?utm_medium=distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-1.pc_relevant_is_cache&depth_1-utm_source=distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-1.pc_relevant_is_cache