如何使用 Gnuplot 创建多页 PDF 文件？

发布于 2024-10-05 19:13:18 字数 509 浏览 6 评论 0原文

我通过 ruby-gnuplot 在 Mac 上使用 Gnuplot 绘制了十几张图。如果我重新运行我的 ruby 脚本，那么带有绘图的打开窗口的数量就会增加一倍。如果我可以将所有这些绘图输出到在预览中打开的 PDF 中，那么该文件将在每次重新运行后自动更新，并且我不需要费心关闭众多窗口。

目前，我只能通过每个 PDF 文件一个图来实现这一点：

Gnuplot.open do |gp|
  Gnuplot::Plot.new(gp) do |plot|
    plot.arbitrary_lines << "set terminal pdf \n set output 'figures.pdf'"
    # ...
  end
end

How can I make a single PDF with my all pictures by Gnuplot?

原文

I make a dozen of plots with Gnuplot on Mac via ruby-gnuplot. If I re-run my ruby script, then the number of open windows with the plots doubles. If I could just output all these plots in a PDF opened in Preview, then the file would be automatically updated after every re-run and I don't need to bother closing the numerous windows.

Currently I can achieve this only with one plot per PDF-file:

Gnuplot.open do |gp|
  Gnuplot::Plot.new(gp) do |plot|
    plot.arbitrary_lines << "set terminal pdf \n set output 'figures.pdf'"
    # ...
  end
end

How can I make a single PDF with all my figures by Gnuplot?

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·深蓝 2024-10-12 19:13:18

嗯，至少在 UN*x 的 gnuplot 上，postscript 和 PDF 的多页输出始终是默认设置 - 只要您不更改终端类型也不重新分配输出文件，您绘制的所有内容都会在新页面上结束。

也就是说，您这样做了：

set terminal pdf
set output "multipageplot.pdf"
plot x, x*x
plot sin(x), cos(x)
set output ""

您最终会在 PDF 文件中得到两页，其中一页包含直线/抛物线，另一页包含正弦/余弦。

澄清一下：重要的是按顺序发出所有 plot 命令，而不更改输出文件或更改终端类型。 Gnuplot 不会附加到现有的 PDF 文件。

Hmm, at least on gnuplot for UN*x, multipage output for postscript and PDF always was the default - as long as you don't either change the terminal type nor reassign the output file, everything you plot ends up on a new page.

I.e. you do:

set terminal pdf
set output "multipageplot.pdf"
plot x, x*x
plot sin(x), cos(x)
set output ""

and you end up with two pages in the PDF file, one containing line/parabola, the other sine/cosine.

To clarify: The important thing is to issue all the plot commands in sequence, without changing the output file nor changing the terminal type. Gnuplot won't append to an existing PDF file.

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浪漫之都 2024-10-12 19:13:18

我使用 ruby-gnuplot 制作了数千个绘图，并使用名为 prawn 的 gem 将它们编译成 pdf。以下是使用 prawn 的代码片段，其中包括一些有用的功能：

require 'prawn'

def create_pdf
  toy_catalogue = @toy_catalogue
  full_output_filename ||= "#{output_path}/#{pre-specified_filename_string}"
  Prawn::Document.generate(full_output_filename, :page_layout => :portrait, :margin => 5, :skip_page_creation => false, :page_size => [595, 1000]) do
    toy_catalogue.each do |toy|
      start_new_page

      image toy[:plan_view], :at => [0,900], :width => 580

      image toy[:front_view], :at => [0, 500], :width => 585

      font_size(20) { draw_text toy[:name], :at => [5, 920] }

      draw_text "production_date = #{toy[:date]}", :at => [420, 930]
    end
  end
end

这应该很容易适应您的目的。

I make thousands of plots with ruby-gnuplot and use a gem called prawn to compile them into a pdf. The following is a code snippet using prawn, that includes some useful features:

require 'prawn'

def create_pdf
  toy_catalogue = @toy_catalogue
  full_output_filename ||= "#{output_path}/#{pre-specified_filename_string}"
  Prawn::Document.generate(full_output_filename, :page_layout => :portrait, :margin => 5, :skip_page_creation => false, :page_size => [595, 1000]) do
    toy_catalogue.each do |toy|
      start_new_page

      image toy[:plan_view], :at => [0,900], :width => 580

      image toy[:front_view], :at => [0, 500], :width => 585

      font_size(20) { draw_text toy[:name], :at => [5, 920] }

      draw_text "production_date = #{toy[:date]}", :at => [420, 930]
    end
  end
end

That should be easy enough to adapt to your purposes.

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