Bar charts

class sage.plot.bar_chart.BarChart(ind, datalist, options)

Bases: GraphicPrimitive

Graphics primitive that represents a bar chart.

EXAMPLES:

Sage

sage: from sage.plot.bar_chart import BarChart
sage: g = BarChart(list(range(4)), [1,3,2,0], {}); g
BarChart defined by a 4 datalist
sage: type(g)
<class 'sage.plot.bar_chart.BarChart'>

Python

>>> from sage.all import *
>>> from sage.plot.bar_chart import BarChart
>>> g = BarChart(list(range(Integer(4))), [Integer(1),Integer(3),Integer(2),Integer(0)], {}); g
BarChart defined by a 4 datalist
>>> type(g)
<class 'sage.plot.bar_chart.BarChart'>

get_minmax_data()

Returns a dictionary with the bounding box data.

EXAMPLES:

Sage

sage: b = bar_chart([-2.3,5,-6,12])
sage: d = b.get_minmax_data()
sage: d['xmin']
0
sage: d['xmax']
4

Python

>>> from sage.all import *
>>> b = bar_chart([-RealNumber('2.3'),Integer(5),-Integer(6),Integer(12)])
>>> d = b.get_minmax_data()
>>> d['xmin']
0
>>> d['xmax']
4

sage.plot.bar_chart.bar_chart(datalist, width=0.5, rgbcolor=(0, 0, 1), legend_label=None, aspect_ratio='automatic', **options)

A bar chart of (currently) one list of numerical data. Support for more data lists in progress.

EXAMPLES:

A bar_chart with blue bars:

Sage

sage: bar_chart([1,2,3,4])
Graphics object consisting of 1 graphics primitive

Python

>>> from sage.all import *
>>> bar_chart([Integer(1),Integer(2),Integer(3),Integer(4)])
Graphics object consisting of 1 graphics primitive

A bar_chart with thinner bars:

Sage

sage: bar_chart([x^2 for x in range(1,20)], width=0.2)
Graphics object consisting of 1 graphics primitive

Python

>>> from sage.all import *
>>> bar_chart([x**Integer(2) for x in range(Integer(1),Integer(20))], width=RealNumber('0.2'))
Graphics object consisting of 1 graphics primitive

A bar_chart with negative values and red bars:

Sage

sage: bar_chart([-3,5,-6,11], rgbcolor=(1,0,0))
Graphics object consisting of 1 graphics primitive

Python

>>> from sage.all import *
>>> bar_chart([-Integer(3),Integer(5),-Integer(6),Integer(11)], rgbcolor=(Integer(1),Integer(0),Integer(0)))
Graphics object consisting of 1 graphics primitive

A bar chart with a legend (it’s possible, not necessarily useful):

Sage

sage: bar_chart([-1,1,-1,1], legend_label='wave')
Graphics object consisting of 1 graphics primitive

Python

>>> from sage.all import *
>>> bar_chart([-Integer(1),Integer(1),-Integer(1),Integer(1)], legend_label='wave')
Graphics object consisting of 1 graphics primitive

Extra options will get passed on to show(), as long as they are valid:

Sage

sage: bar_chart([-2,8,-7,3], rgbcolor=(1,0,0), axes=False)
Graphics object consisting of 1 graphics primitive
sage: bar_chart([-2,8,-7,3], rgbcolor=(1,0,0)).show(axes=False) # These are equivalent

Python

>>> from sage.all import *
>>> bar_chart([-Integer(2),Integer(8),-Integer(7),Integer(3)], rgbcolor=(Integer(1),Integer(0),Integer(0)), axes=False)
Graphics object consisting of 1 graphics primitive
>>> bar_chart([-Integer(2),Integer(8),-Integer(7),Integer(3)], rgbcolor=(Integer(1),Integer(0),Integer(0))).show(axes=False) # These are equivalent