Class: CmdPlot::Bar

Inherits:
Object
  • Object
show all
Defined in:
lib/cmd_plot/bar.rb

Instance Method Summary collapse

Constructor Details

#initialize(width = 140, height = 40, symbol = '°') ⇒ Bar

Returns a new instance of Bar.



2
3
4
5
6
 
# File 'lib/cmd_plot/bar.rb', line 2

def initialize(width = 140, height = 40, symbol = '°')
    @width = width
    @height = height
    @symbol = symbol
end

Instance Method Details

#bar(height, labels) ⇒ Object 



8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
 
# File 'lib/cmd_plot/bar.rb', line 8

def bar(height, labels)
    # Calculate scaling of data to plot
    max_height = height.max.to_f
    max_label_length = labels.map { |l| l.length }.max
    max_val_length = height.map { |l| l.to_s.length }.max
    max_bar_length = (@width - max_label_length - max_val_length - 3)
    # Plot each bar
    for data in height.zip(labels)
        label_fill_space = ' ' * (max_label_length - data[1].length)
        value_fill_space = ' ' * (max_val_length - data[0].to_s.length)
        bar_plot = @symbol * ((data[0] / max_height) * max_bar_length).round
        puts "#{label_fill_space}#{data[1]}: #{value_fill_space}#{data[0]} #{bar_plot}"
    end
    return nil
end

#histogram(data, bins = 20) ⇒ Object 



24
25
26
27
28
29
 
# File 'lib/cmd_plot/bar.rb', line 24

def histogram(data, bins = 20)
    # Turn data into bins with counts
    counts, bin_centers = BasicData.build_hist(data, bins)
    # Plot as bar chart
    bar(counts, bin_centers.map { |p| p.round(1).to_s })
end