Class: Charty::Backends::Bokeh

Inherits:
Object
  • Object
show all
Defined in:
lib/charty/backends/bokeh.rb

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initializeBokeh

Returns a new instance of Bokeh.


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# File 'lib/charty/backends/bokeh.rb', line 12

def initialize
  @plot = PyCall.import_module('bokeh.plotting')
end

Class Method Details

.prepareObject


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# File 'lib/charty/backends/bokeh.rb', line 7

def prepare
  require 'pycall'
end

Instance Method Details

#old_style_render(context, filename) ⇒ Object


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# File 'lib/charty/backends/bokeh.rb', line 20

def old_style_render(context, filename)
  plot = plot(context)
  save(plot, context, filename)
  PyCall.import_module('bokeh.io').show(plot)
end

#old_style_save(plot, context, filename) ⇒ Object


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# File 'lib/charty/backends/bokeh.rb', line 26

def old_style_save(plot, context, filename)
  if filename
    PyCall.import_module('bokeh.io').save(plot, filename)
  end
end

#plot(context) ⇒ Object


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# File 'lib/charty/backends/bokeh.rb', line 32

def plot(context)
  #TODO To implement boxplot, bublle, error_bar, hist.

  plot = @plot.figure(title: context&.title)
  plot.xaxis[0].axis_label = context&.xlabel
  plot.yaxis[0].axis_label = context&.ylabel

  case context.method
  when :bar
    context.series.each do |data|
      diffs = data.xs.to_a.each_cons(2).map {|n, m| (n - m).abs }
      width = diffs.min * 0.8
      plot.vbar(data.xs.to_a, width, data.ys.to_a)
    end

  when :barh
    context.series.each do |data|
      diffs = data.xs.to_a.each_cons(2).map {|n, m| (n - m).abs }
      height = diffs.min * 0.8
      plot.hbar(data.xs.to_a, height, data.ys.to_a)
    end

  when :boxplot
    raise NotImplementedError

  when :bubble
    raise NotImplementedError

  when :curve
    context.series.each do |data|
      plot.line(data.xs.to_a, data.ys.to_a)
    end

  when :scatter
    context.series.each do |data|
      plot.scatter(data.xs.to_a, data.ys.to_a)
    end

  when :error_bar
    raise NotImplementedError

  when :hist
    raise NotImplementedError
  end
  plot
end

#series=(series) ⇒ Object


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# File 'lib/charty/backends/bokeh.rb', line 16

def series=(series)
  @series = series
end