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Contents
#!/usr/bin/env ruby
#
require 'tmpdir'
require 'optparse'
options = {}
OptionParser.new do |opts|
opts.banner = "
histogram - Creates png charts using date-time and value data from text.
Reads two numeric columns from stdin (x, y)
and creates a png graphical chart.
Usage: cat data | #{File.basename($0)} [options]
"
opts.on("-tTITLE", "--title=TITLE", "title of chart") do |v|
options[:title] = v
end
opts.on("-xTEXT", "--x-label=TEXT", "label for x axis") do |v|
options[:x_label] = v
end
opts.on("-yTEXT", "--y-label=TEXT", "label for y axis") do |v|
options[:y_label] = v
end
opts.on("-oOUTPUT_NAME", "--output-name=OUTPUT_NAME", "name of output file (example: speed_vs_time") do |v|
options[:output] = v
end
end.parse!
unless options[:title]
options[:title] = 'title'
end
unless options[:x_label]
options[:x_label] = 'x'
end
unless options[:y_label]
options[:y_label] = 'y'
end
unless options[:output]
options[:output] = 'output'
end
Dir.mktmpdir do |dir|
data_path = "#{dir}/histogram.data"
script_path = "#{dir}/script.gnuplot"
File.open(data_path, 'w+') do |file|
STDIN.each_line do |line|
file.puts line
end
end
File.open(script_path, 'w+') do |script|
script.puts "set term png size 800,600"
script.puts "set style histogram clustered"
script.puts "set grid"
script.puts "set timestamp"
script.puts "set output \"#{options[:output]}.png\""
script.puts "plot for [COL=2:4] '#{data_path}' using COL:xticlabels(1) title columnheader"
script.puts "plot for [COL=2:4] '#{data_path}' using COL:xticlabels(1) title columnheader(2), for [i=3:22] '' using i title columnheader(i)"
script.puts "quit"
end
system "gnuplot #{script_path}"
puts "open #{options[:output]}.png"
end
Version data entries
26 entries across 26 versions & 1 rubygems