In [1]:

require 'daru/view'

Install the spreadsheet gem version ~>1.1.1 for using spreadsheet functions.

Install the mechanize gem version ~>2.7.5 for using mechanize functions.

Out[1]:

true

In [2]:

Daru::View.plotting_library = :googlecharts

Out[2]:

:googlecharts

In [3]:

data_rows = [
          ['Mon', 20, 28, 38, 45],
      ['Tue', 31, 38, 55, 66],
      ['Wed', 50, 55, 77, 80],
      ['Thu', 77, 77, 66, 50],
      ['Fri', 68, 66, 22, 15]
]
df_Candlestick = Daru::DataFrame.rows(data_rows)

df_Candlestick

Out[3]:

Daru::DataFrame(5x5)

	0	1	2	3	4
0	Mon	20	28	38	45
1	Tue	31	38	55	66
2	Wed	50	55	77	80
3	Thu	77	77	66	50
4	Fri	68	66	22	15

In [7]:

candlestick_chart = Daru::View::Plot.new(df_Candlestick, type: :candlestick, height: 500)
candlestick_chart.show_in_iruby

Out[7]:

Waterfall charts¶

In [9]:

opts = {
  type: :candlestick, height: 500,
  legend: 'none',
          bar: { groupWidth: '100%' }, # Remove space between bars.
          candlestick: {
            fallingColor: { strokeWidth: 0, fill: '#a52714' }, # red
            risingColor: { strokeWidth: 0, fill: '#0f9d58' }   # green
          }
  }
waterfall_chart = Daru::View::Plot.new(df_Candlestick, opts)
waterfall_chart.show_in_iruby

Out[9]:

In [ ]:

	0	1	2	3	4
0	Mon	20	28	38	45
1	Tue	31	38	55	66
2	Wed	50	55	77	80
3	Thu	77	77	66	50
4	Fri	68	66	22	15

	0	1	2	3	4
0	Mon	20	28	38	45
1	Tue	31	38	55	66
2	Wed	50	55	77	80
3	Thu	77	77	66	50
4	Fri	68	66	22	15

	0	1	2	3	4
0	Mon	20	28	38	45
1	Tue	31	38	55	66
2	Wed	50	55	77	80
3	Thu	77	77	66	50
4	Fri	68	66	22	15