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Gnuplot::Plot

Holds command information and performs the formatting of that command information to a Gnuplot process. When constructing a new plot for gnuplot, this is the first object that must be instantiated. On this object set the various properties and add data sets.

Constants

QUOTED

Attributes

arbitrary_lines[RW]
cmd[RW]
data[RW]
settings[RW]

Public Class Methods

new(io = nil, cmd = "plot") click to toggle source 
# File lib/gnuplot.rb, line 95
def initialize (io = nil, cmd = "plot")
  @cmd = cmd
  @settings = []
  @arbitrary_lines = []
  @data = []
  yield self if block_given?
  puts "writing this to gnuplot:\n" + to_gplot + "\n" if $VERBOSE

  if io    
    io << to_gplot
    io << store_datasets
  end
end

Public Instance Methods

[]( var ) click to toggle source

Return the current value of the variable. This will return the setting that is currently in the instance, not one that's been given to a gnuplot process.

# File lib/gnuplot.rb, line 141
def [] ( var )
  v = @settings.rassoc( var )
  if v.nil? or v.first == :unset
      nil
  else
      v[2]
  end
end
add_data( ds ) click to toggle source 
# File lib/gnuplot.rb, line 151
def add_data ( ds )
  @data << ds
end
method_missing( methId, *args ) click to toggle source

Invoke the set method on the plot using the name of the invoked method as the set variable and any arguments that have been passed as the value. See the set method for more details.

# File lib/gnuplot.rb, line 114
def method_missing( methId, *args )
  set methId.id2name, *args
end
set( var, value = "" ) click to toggle source

Set a variable to the given value. Var must be a gnuplot variable and value must be the value to set it to. Automatic quoting will be performed if the variable requires it.

This is overloaded by the method_missing method so see that for more readable code.

# File lib/gnuplot.rb, line 126
def set ( var, value = "" )
  value = "\"#{value}\"" if QUOTED.include? var unless value =~ /^'.*'$/
  @settings << [ :set, var, value ]
end
store_datasets(io = "") click to toggle source 
# File lib/gnuplot.rb, line 165
def store_datasets (io = "")
  if @data.size > 0
    io << @cmd << " " << @data.collect { |e| e.plot_args }.join(", ")
    io << "\n"

    v = @data.collect { |ds| ds.to_gplot }
    io << v.compact.join("e\n")
  end
  
  io
end
to_gplot(io = "") click to toggle source 
# File lib/gnuplot.rb, line 156
def to_gplot (io = "")
  @settings.each do |setting|
      io << setting.map(&:to_s).join(" ") << "\n"
  end
  @arbitrary_lines.each{|line| io << line << "\n" }

  io
end
unset( var ) click to toggle source

Unset a variable. Var must be a gnuplot variable.

# File lib/gnuplot.rb, line 132
def unset ( var )
    @settings << [ :unset, var ]
end

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