From: Jason Lillywhite <jason.lillywhite@...>
Date: 2009-06-05T03:27:51+09:00
Subject: Use methods from a library in my own class

I want to create a class that uses the RubyGnuplot library that can
create a plot using one simple command and only add options if so
desired. Below is what I have done so far and I was wondering if someone
could provide some opinion on my approach. I ran into a problem where I
allow the user to add 3 options but what I really want is access to all
the library's methods so colors and lineweights, etc can be changed if
so desired. Is there a better approach than using a hash input like I'm
doing? Thank you!

#For simple 2D line plots. File is called 'my_plotter.rb'

require 'gnuplot'
class Data2d
  def self.plot(x, y, options={})
    Gnuplot.open do |gp|
      Gnuplot::Plot.new( gp ) do |plot|

  plot.title  "#{options[:title]}"
  plot.ylabel "#{options[:y_label]}"
  plot.xlabel "#{options[:x_label]}"

  plot.data << Gnuplot::DataSet.new( [x, y] ) do |ds|
    ds.with = "lines"
  end
      end
    end
  end
end

#Now all users need to do is create the data,

require 'my_plotter'

x = [1,2,3,4,5]
y = [5,6,3,8,9]

#then run the command,

Data2d.plot(x,y)

#or, with options,

Data2d.plot(x,y,:x_label=>"Time",:y_label=>"Values", :title=>"My First
Plot")
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