Python编程pygal绘图实例之XY线

Python  /  管理员 发布于 7年前   394

安装pygal，可参阅：pip和pygal的安装实例教程

基本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')

散点图：

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')

日期：

你可以使用日期模块绘制与日期有关的图表

DateTime

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')

Date

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')

Time

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')

TimeDelta

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')

总结

以上就是本文关于Python编程pygal绘图实例之XY线的全部内容，希望对大家有所帮助。感兴趣的朋友可以继续参阅本站其他相关专题，如有不足之处，欢迎留言指出。感谢朋友们对本站的支持！