From: Joel VanderWerf <vjoel@...>
Date: 2009-06-05T04:56:19+09:00
Subject: Re: Use methods from a library in my own class

Jason Lillywhite wrote:
> 2. How do I apply your idea to methods within an embedded array block 
> such as "plot.data" from my code:
> 
>   plot.data << Gnuplot::DataSet.new( [x, y] ) do |ds|
>     ds.with = "lines"
>   end
> 
> which has methods such as ds.linewidth, ds.title, etc? I tried multiple 
> things like creating 2 hashes but can't get my hash values to pass into 
> the embedded array. Thank you!

Something like this?

require 'gnuplot'
class Data2d
   def self.plot(x, y, options={})
     Gnuplot.open do |gp|
       Gnuplot::Plot.new( gp ) do |plot|
         options.each {|opt,val| plot.send opt, val}
         ds_options = options[:ds]
         plot.data << Gnuplot::DataSet.new( [x, y] ) do |ds|
           ds_options.each {|opt,val| ds.send opt, val}
         end
       end
     end
   end
end

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


-- 
       vjoel : Joel VanderWerf : path berkeley edu : 510 665 3407