在R中保存多个pdf文件时出现问题 [英] Problems saving several pdf files in R
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问题描述
我正在尝试在R中保存多个用"for"循环创建的xyplots,如果执行以下循环:
I'm trying to save several xyplots created with a "for" loop in R and I'm not able to get complete pdf files (all files have the same size and I can't open them) if I execute the following loop:
for (i in 1:length(gases.names)) {
# Set ylim;
r_y <- round(range(ratio.cal[,i][ratio.cal[,i]<999], na.rm = T), digits = 1);
r_y <- c(r_y[1]-0.1, r_y[2]+0.1);
outputfile <- paste (path, "/cal_ratio_",gases.names[i], ".pdf", sep="");
dev.new();
xyplot(ratio.cal[,i] ~ data.GC.all$data.time, groups = data.vial, panel =
panel.superpose, xlab = "Date", ylab = gases.names[i], xaxt="n", ylim = r_y);
savePlot(filename = outputfile, type = 'pdf', device = dev.cur());
dev.off();
}
(以前的版本使用的是trellis.device()
而不是dev.new() + savePlot()
)
(a previous version was using trellis.device()
instead of dev.new() + savePlot()
)
您知道为什么我无法获得优质的pdf文件吗?如果我手动"执行此操作,则可以...有任何想法吗?
Do you know why I can't get good pdf files? If I do it "manually" it works... Any idea?
推荐答案
直接使用pdf
for (i in seq_along(gases.names)) {
# Set ylim
r_y <- round(range(ratio.cal[,i][ratio.cal[,i]<999], na.rm = T), digits = 1)
r_y <- c(r_y[1]-0.1, r_y[2]+0.1)
outputfile <- paste (path, "/cal_ratio_",gases.names[i], ".pdf", sep="")
pdf(file = outputfile, width = 7, height = 7)
print(xyplot(ratio.cal[,i] ~ data.GC.all$data.time, groups = data.vial,
panel = panel.superpose, xlab = "Date", ylab = gases.names[i],
xaxt="n", ylim = r_y))
dev.off()
}
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