Python编程pygal绘图实例之XY线

import pygalfrom math import cos"""XY线是将各个点用直线连接起来的折线图需提供一个横纵坐标元组作为元素的列表"""xy_chart = pygal.XY()xy_chart.title = 'XY Cosinus'xy_chart.add('x = cos(y)', [(cos(x / 10.), x / 10.) for x in range(-50, 50, 5)])xy_chart.add('y = cos(x)', [(x / 10., cos(x / 10.)) for x in range(-50, 50, 5)])xy_chart.add('x = 1', [(1, -5), (1, 5)])xy_chart.add('x = -1', [(-1, -5), (-1, 5)])xy_chart.add('y = 1', [(-5, 1), (5, 1)])xy_chart.add('y = -1', [(-5, -1), (5, -1)])xy_chart.render_to_file('bar_chart.svg')

import pygalxy_chart = pygal.XY(stroke=False)xy_chart.title = 'Correlation'xy_chart.add('A', [(0, 0), (.1, .2), (.3, .1), (.5, 1), (.8, .6), (1, 1.08), (1.3, 1.1), (2, 3.23), (2.43, 2)])xy_chart.add('B', [(.1, .15), (.12, .23), (.4, .3), (.6, .4), (.21, .21), (.5, .3), (.6, .8), (.7, .8)])xy_chart.add('C', [(.05, .01), (.13, .02), (1.5, 1.7), (1.52, 1.6), (1.8, 1.63), (1.5, 1.82), (1.7, 1.23), (2.1, 2.23), (2.3, 1.98)])xy_chart.render_to_file('bar_chart.svg')

import pygalfrom datetime import datetimedatetimeline = pygal.DateTimeLine(  x_label_rotation=35, truncate_label=-1,  x_value_formatter=lambda dt: dt.strftime('%d, %b %Y at %I:%M:%S %p'))datetimeline.add("Serie", [  (datetime(2013, 1, 2, 12, 0), 300),  (datetime(2013, 1, 12, 14, 30, 45), 412),  (datetime(2013, 2, 2, 6), 823),  (datetime(2013, 2, 22, 9, 45), 672)])datetimeline.render_to_file('bar_chart.svg')

import pygalfrom datetime import datedateline = pygal.DateLine(x_label_rotation=25)dateline.x_labels = [  date(2013, 1, 1),  date(2013, 7, 1),  date(2014, 1, 1),  date(2014, 7, 1),  date(2015, 1, 1),  date(2015, 7, 1)]dateline.add("Serie", [  (date(2013, 1, 2), 213),  (date(2013, 8, 2), 281),  (date(2014, 12, 7), 198),  (date(2015, 3, 21), 120)])dateline.render_to_file('bar_chart.svg')

import pygalfrom datetime import timedateline = pygal.TimeLine(x_label_rotation=25)dateline.add("Serie", [  (time(), 0),  (time(6), 5),  (time(8, 30), 12),  (time(11, 59, 59), 4),  (time(18), 10),  (time(23, 30), -1),])dateline.render_to_file('bar_chart.svg')

import pygalfrom datetime import timedeltadateline = pygal.TimeDeltaLine(x_label_rotation=25)dateline.add("Serie", [ (timedelta(), 0), (timedelta(seconds=6), 5), (timedelta(minutes=11, seconds=59), 4), (timedelta(days=3, microseconds=30), 12), (timedelta(weeks=1), 10),])dateline.render_to_file('bar_chart.svg')