Class: UnicodePlot::Boxplot

Inherits:
Plot
  • Object
show all
Defined in:
src/lib/unicode_plot/boxplot.rb

Constant Summary collapse

MIN_WIDTH = 
10
DEFAULT_COLOR = 
:green

Constants inherited from Plot

Plot::COLOR_CYCLE, Plot::DEFAULT_BORDER, Plot::DEFAULT_MARGIN, Plot::DEFAULT_PADDING, Plot::DEFAULT_WIDTH

Constants included from StyledPrinter

StyledPrinter::COLOR_DECODE, StyledPrinter::COLOR_ENCODE, StyledPrinter::DISABLE_TEXT_STYLE, StyledPrinter::TEXT_COLORS

Instance Attribute Summary collapse

Attributes inherited from Plot

#border, #colors_deco, #colors_left, #colors_right, #decorations, #labels_left, #labels_right, #margin, #padding, #title, #xlabel, #ylabel

Instance Method Summary collapse

Methods inherited from Plot

#annotate!, #annotate_row!, #next_color, #render, #show_labels?, #title_given?, #to_s, #xlabel_given?, #ylabel_given?, #ylabel_length

Methods included from StyledPrinter

#print_color, #print_styled

Constructor Details

#initialize(data, width, color, min_x, max_x, **kw) ⇒ Boxplot

Returns a new instance of Boxplot.



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# File 'src/lib/unicode_plot/boxplot.rb', line 8

def initialize(data, width, color, min_x, max_x, **kw)
  if min_x == max_x
    min_x -= 1
    max_x += 1
  end
  width = [width, MIN_WIDTH].max
  @data = [data.percentile([0, 25, 50, 75, 100])]
  @color = color
  @width = [width, MIN_WIDTH].max
  @min_x = min_x
  @max_x = max_x
  super(**kw)
end

Instance Attribute Details

#max_x ⇒ Object (readonly)

Returns the value of attribute max_x.



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# File 'src/lib/unicode_plot/boxplot.rb', line 23

def max_x
  @max_x
end

#min_x ⇒ Object (readonly)

Returns the value of attribute min_x.



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# File 'src/lib/unicode_plot/boxplot.rb', line 22

def min_x
  @min_x
end

Instance Method Details

#add_series!(data) ⇒ Object 



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# File 'src/lib/unicode_plot/boxplot.rb', line 37

def add_series!(data)
  mi, ma = data.minmax
  @data << data.percentile([0, 25, 50, 75, 100])
  @min_x = [mi, @min_x].min
  @max_x = [ma, @max_x].max
end

#n_columns ⇒ Object 



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# File 'src/lib/unicode_plot/boxplot.rb', line 33

def n_columns
  @width
end

#n_data ⇒ Object 



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# File 'src/lib/unicode_plot/boxplot.rb', line 25

def n_data
  @data.length
end

#n_rows ⇒ Object 



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# File 'src/lib/unicode_plot/boxplot.rb', line 29

def n_rows
  3 * @data.length
end

#print_row(out, row_index) ⇒ Object 



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# File 'src/lib/unicode_plot/boxplot.rb', line 44

def print_row(out, row_index)
  check_row_index(row_index)
  series = @data[(row_index / 3.0).to_i]

  series_row = row_index % 3

  min_char       = ['╷', '├' , '╵'][series_row]
  line_char      = [' ', '─' , ' '][series_row]
  left_box_char  = ['┌', '┤' , '└'][series_row]
  line_box_char  = ['─', ' ' , '─'][series_row]
  median_char    = ['┬', '│' , '┴'][series_row]
  right_box_char = ['┐', '├' , '┘'][series_row]
  max_char       = ['╷', '┤' , '╵'][series_row]

  line = (0 ... @width).map { ' ' }

  # Draw shapes first - this is most important,
  # so they'll always be drawn even if there's not enough space

  transformed = transform(series)
  line[transformed[0] - 1] = min_char
  line[transformed[1] - 1] = left_box_char
  line[transformed[2] - 1] = median_char
  line[transformed[3] - 1] = right_box_char
  line[transformed[4] - 1] = max_char

  (transformed[0] ... (transformed[1] - 1)).each do |i|
    line[i] = line_char
  end
  (transformed[1] ... (transformed[2] - 1)).each do |i|
    line[i] = line_box_char
  end
  (transformed[2] ... (transformed[3] - 1)).each do |i|
    line[i] = line_box_char
  end
  (transformed[3] ... (transformed[4] - 1)).each do |i|
    line[i] = line_char
  end

  print_styled(out, line.join(''), color: @color)
end