在R中同时生成多种格式的图片

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#shut down all open graphics devices
graphics.off()
 
png(file="master.png")
dev.control("enable")
plot(1:10)
 
jpeg(file="copy1.jpg",width=600,height=600)
dev.set(2)
dev.copy(which=3)
 
pdf(file="copy2.pdf",width=9,height=9)
dev.set(2)
dev.copy(which=4) 
 
svg(file="copy3.svg",width=3,height=3)
dev.set(2)
dev.copy(which=5) 
 
graphics.off()