for循环在单独的文件中生成并保存多个ggplots [英] for loop to generate and save multiple ggplots in a separate file

问题描述

我的数据(TransDat70)总共包含103个变量.第一个102命名为"V1"至"V102"，最后一个变量命名为"Time.Min".

My data (TransDat70) contains 103 variables total. The first 102 are named "V1" through "V102", the last variable is names "Time.Min".

我需要针对变量"Time.Min"生成每个变量(V1至V102)的102个ggplots.然后，我需要将所有这些ggplots保存在一个单独的文件(pdf)中，为了相互比较，最好将所有这些ggplots彼此紧挨着放置.

I need to generate 102 ggplots of each variable (V1 through V102) against the variable "Time.Min". I then need to save all these ggplots in a separate file (pdf) preferably all next to/below one another for comparison purposes.

我尝试使用可以在网上找到的代码，但到目前为止，没有一个对我有用.

I tried using code that I was able to find online but none has worked for me so far.

这是我的代码:

var_list = combn(names(TransDat70)[1: 102], 2, simplify = FALSE)
plot_list = list()

for (i in 1: 3) {
    p = ggplot(TransDat70, aes_string(x = var_list[[i]][1], y = var_list[[i]][2])) + geom_point()
    plot_list[[i]] = p
}

for (i in 1: 3) {
    plot70 = paste("iris_plot_", i, ".tiff", sep = "")
    tiff(plot70)
    print(plot_list[[i]])
    dev.off()
}

pdf("plots.pdf")

for (i in 1: 3) {
    print(plot_list[[i]])
}

dev.off()

有什么建议吗?

推荐答案

如果用单独"来表示每个图都在单独的文件中，那该怎么办?

If by separate you meant each plot in a separate file, how about this?

library(ggplot2)

# FAKE DATA AS EXAMPLE
TransDat70 <- data.frame(
  1:10,
  1:10,
  1:10,
  1:10,
  1:10
)

colnames(TransDat70) <- c('V1', 'V2', 'V3', 'V4', 'Time.Min')

for (i in 1:(length(TransDat70) - 1)) {
  p <- ggplot(TransDat70, aes_string(x = paste('V', toString(i), sep=''), y='Time.Min')) + geom_point()
  ggsave(paste('~/Desktop/plot_', i, '.pdf', sep=''), p)
}

有关更多信息，请参见 ggsave 文档选项.

See the ggsave documentation for more options.

如果您打算将它们全部放在一个大文件中，请查看

If you meant to have them all in one big file, take a look at Printing multiple ggplots into a single pdf, multiple plots per page.

但是，对于这么多绘图来说，可能会产生一个很大的文件，这可能会导致打开时出现问题，尤其是在您的绘图中有很多点的情况下.在这种情况下，最好将它们作为单独的文件进行比较.

However, for that many plots it would make a likely make a huge file, which could be problematic to open, especially if you have many points in your plots. In that case it might be better to compare them as separate files.

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