Method: Charty::Plotters::HistogramPlotter#univariate_variable

Defined in:
lib/charty/plotters/histogram_plotter.rb

#univariate_variable ⇒ Object 



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# File 'lib/charty/plotters/histogram_plotter.rb', line 8

def univariate_variable
  unless univariate?
    raise TypeError, "This is not a univariate plot"
  end
  ([:x, :y] & self.variables.keys)[0]
end