代码语言：javascript复制
setwd("C:\Users\Administrator\Desktop\pic")
# Plot separate ggplot figures in a loop.
library(ggplot2)
# Make list of variable names to loop over.
var_list = combn(names(iris)[1:3], 2, simplify=FALSE)
# Make plots.
plot_list = list()
for (i in 1:3) {
p = ggplot(iris, aes_string(x=var_list[[i]][1], y=var_list[[i]][2]))
geom_point(size=3, aes(colour=Species))
plot_list[[i]] = p
}
# Save plots to tiff. Makes a separate file for each plot.
for (i in 1:3) {
file_name = paste("iris_plot_", i, ".tiff", sep="")
tiff(file_name)
print(plot_list[[i]])
dev.off()
}
# Another option: create pdf where each page is a separate plot.
pdf("plots.pdf")
for (i in 1:3) {
print(plot_list[[i]])
}
dev.off() 
