Class: RubyPost::SimplePlot

Inherits:
Picture show all
Defined in:
lib/simpleplot.rb

Instance Attribute Summary collapse

Attributes inherited from Picture

#name

Instance Method Summary collapse

Methods inherited from Picture

#add_drawable, #compile

Methods inherited from Object

#compile

Constructor Details

#initialize(width, height) ⇒ SimplePlot

initialise with height and width in centemeters



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# File 'lib/simpleplot.rb', line 10

def initialize(width, height)
  super()
  @plot_array = Array.new
  @height = height
  @width = width
  #axes set by default
  setaxes(-1,1,-1,1)
  @xtickstr = "\n"
  @ytickstr = "\n"
  @xlabel = "\n"
  @ylabel = "\n"
  @drawxaxis = true
  @drawyaxis = true
end

Instance Attribute Details

#drawxaxis=(value) ⇒ Object (writeonly)

Sets the attribute drawxaxis

Parameters:

  • value —

    the value to set the attribute drawxaxis to.



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# File 'lib/simpleplot.rb', line 7

def drawxaxis=(value)
  @drawxaxis = value
end

#drawyaxis=(value) ⇒ Object (writeonly)

Sets the attribute drawyaxis

Parameters:

  • value —

    the value to set the attribute drawyaxis to.



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# File 'lib/simpleplot.rb', line 7

def drawyaxis=(value)
  @drawyaxis = value
end

Instance Method Details

#add_plot(plot) ⇒ Object

the scale factors are decided by the very last plot you add you can adjust it with the axes command



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# File 'lib/simpleplot.rb', line 27

def add_plot(plot)
  @plot_array.push(plot)
  setaxesfor(plot)
end

#precompile ⇒ Object 



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# File 'lib/simpleplot.rb', line 80

def precompile
  str = "picture " + @name + ";\n"

  #draw the axes
  str = str + "\n%draw the axes\n"
  str = str + 'draw ((' + (@xscale*@xmax + 0.6).to_s + 'cm,0)--('+ (@xscale*@xmin - 0.3).to_s + "cm,0));\n" if (@drawxaxis)
  str = str + 'draw ((0, ' + (@yscale*@ymin).to_s + 'cm)--(0, ' + (@yscale*@ymax + 0.6).to_s + "cm));\n" if (@drawyaxis)

  str = str + "\n%draw xticks\n"
  str = str + @xtickstr
  str = str + "\n%draw yticks\n"
  str = str + @ytickstr
  str = str + "\n%draw xticks\n"
  str = str + @xlabel
  str = str + "\n%draw yticks\n"
  str = str + @ylabel


  #draw each plot componenet.
  @plot_array.each{|p| 
    str = str + p.compilewithscale(@xscale, @yscale) }

  str = str + @name + " := currentpicture; currentpicture := " + @@org_picture + ";\n"
end

#setaxes(xmin, xmax, ymin, ymax) ⇒ Object 



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# File 'lib/simpleplot.rb', line 38

def setaxes(xmin, xmax, ymin, ymax)
  @xmax = xmax
  @xmin = xmin
  @ymax = ymax
  @ymin = ymin

  @xscale = @width.to_f/(xmax - xmin)
  @yscale = @height.to_f/(ymax - ymin)
end

#setaxesfor(plot) ⇒ Object 



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# File 'lib/simpleplot.rb', line 32

def setaxesfor(plot)
  puts plot.xmin
  puts plot.ymax
  setaxes(plot.xmin, plot.xmax, plot.ymin, plot.ymax)
end

#xlabel(t) ⇒ Object 



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# File 'lib/simpleplot.rb', line 72

def xlabel(t)
  @xlabel = 'label.top(' + t + ', (' + (@xscale*@xmax + 0.6).to_s + "cm,0));\n"
end

#xticks(x, label = nil, func = lambda {|v| 1}) ⇒ Object

set xtick marks, a is an array of tick position and label is the text for each tick. func describes whether a tick should be put on the top or the bottom. func(x) should return positive for on the bottom and negative for on the top.



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# File 'lib/simpleplot.rb', line 52

def xticks(x, label=nil, func = lambda {|v| 1} )
  if(label==nil) then label = x.map{|v| latex(v.to_s) } end
  lplace = x.map{ |v| if(func.call(v) < 0) then 'top' else 'bot' end }
  @xtickstr = ''
  x.each_index{ |i|
    @xtickstr = @xtickstr + 'draw ((0,-0.05cm)--(0,0.05cm)) shifted (' + (x[i]*@xscale).to_s + "cm, 0);\n"
    @xtickstr = @xtickstr + 'label.' + lplace[i].to_s + '(' + label[i] + ' ,(' + (x[i]*@xscale).to_s + "cm, 0));\n"
  }
end

#ylabel(t) ⇒ Object 



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# File 'lib/simpleplot.rb', line 76

def ylabel(t)
  @ylabel = 'label.rt(' + t + ', (0, ' + (@yscale*@ymax + 0.6).to_s + "cm));\n"
end

#yticks(y, label = nil) ⇒ Object

set ytick marks, a is an array of tick position and laebl is the text



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# File 'lib/simpleplot.rb', line 63

def yticks(y, label=nil )
  if(label==nil) then label = y.map{|v| latex(v.to_s) } end
  @ytickstr = ''
  y.each_index{ |i|
    @ytickstr = @ytickstr + 'draw ((-0.05cm,0)--(0.05cm,0)) shifted (0,' + (y[i]*@yscale).to_s + "cm);\n"
    @ytickstr = @ytickstr + 'label.rt(' + label[i] + ' ,(0,' + (y[i]*@yscale).to_s + "cm));\n"
  }
end