# File lib/gnuplot.rb, line 137
137:     def initialize (io = nil, cmd = "splot")
138:       super
139:     end

     # File lib/gnuplot.rb, line 141
141:     def to_gplot (io = "")
142:       @sets.each { |var, val| io << "set #{var} #{val}\n" }
143: 
144:       if @data.size > 0 then
145:         io << @cmd << " " 
146:         io << @data.collect { |e| e.plot_args }.join(", ")
147:         io << "\n"
148: 
149:         @data.each do |ds| 
150:           io << ds.to_gsplot << "e\n"
151:         end
152:       end
153: 
154:       io
155:     end