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这篇文章给大家分享的是有关Python编程深度学习绘图库之matplotlib怎么用的内容。小编觉得挺实用的,因此分享给大家做个参考,一起跟随小编过来看看吧。
创新互联建站客户idc服务中心,提供绵阳服务器托管、成都服务器、成都主机托管、成都双线服务器等业务的一站式服务。通过各地的服务中心,我们向成都用户提供优质廉价的产品以及开放、透明、稳定、高性价比的服务,资深网络工程师在机房提供7*24小时标准级技术保障。matplotlib是python的一个开源的2D绘图库,它的原作者是John D. Hunter,因为在设计上借鉴了matlab,所以成为matplotlib。和Pillow一样是被广泛使用的绘图功能,而在深度学习相关的部分,matplotlib得宠的多。这篇文章将简单介绍一下如何安装以及使用它来画一些非常常见的统计图形。
概要信息
注意事项:由于Python2支持到2020年,很多python库都开始主要支持python3了,matplotlib的主分支也已经是python3了。而这篇文章中为了简单,安装和demo代码依然是在python2.7上进行验证的。
安装
使用pip install即可直接安装。安装日志如下:
liumiaocn:tmp liumiao$ python -mpip install -U pip Requirement already up-to-date: pip in /usr/local/lib/python2.7/site-packages (10.0.1) liumiaocn:tmp liumiao$ liumiaocn:tmp liumiao$ python -mpip install -U matplotlib Collecting matplotlib Downloading https://files.pythonhosted.org/packages/61/38/d70e8bf77d5cb27d5f3595edd0b3978825063feadd023786d2591e393e6e/matplotlib-2.2.2-cp27-cp27m-macosx_10_6_intel.macosx_10_9_intel.macosx_10_9_x86_64.macosx_10_10_intel.macosx_10_10_x86_64.whl (13.7MB) 100% |████████████████████████████████| 13.7MB 2.1MB/s Collecting pyparsing!=2.0.4,!=2.1.2,!=2.1.6,>=2.0.1 (from matplotlib) Downloading https://files.pythonhosted.org/packages/6a/8a/718fd7d3458f9fab8e67186b00abdd345b639976bc7fb3ae722e1b026a50/pyparsing-2.2.0-py2.py3-none-any.whl (56kB) 100% |████████████████████████████████| 61kB 5.8MB/s Collecting backports.functools-lru-cache (from matplotlib) Downloading https://files.pythonhosted.org/packages/03/8e/2424c0e65c4a066e28f539364deee49b6451f8fcd4f718fefa50cc3dcf48/backports.functools_lru_cache-1.5-py2.py3-none-any.whl Collecting subprocess32 (from matplotlib) Downloading https://files.pythonhosted.org/packages/fa/60/b50459f291cae6bc1d0ff711b75e5130684fd3949370fdba78f6c57c1903/subprocess32-3.5.2-cp27-cp27m-macosx_10_6_intel.whl Collecting pytz (from matplotlib) Downloading https://files.pythonhosted.org/packages/dc/83/15f7833b70d3e067ca91467ca245bae0f6fe56ddc7451aa0dc5606b120f2/pytz-2018.4-py2.py3-none-any.whl (510kB) 100% |████████████████████████████████| 512kB 8.9MB/s Requirement not upgraded as not directly required: six>=1.10 in /usr/local/lib/python2.7/site-packages (from matplotlib) (1.11.0) Collecting python-dateutil>=2.1 (from matplotlib) Downloading https://files.pythonhosted.org/packages/cf/f5/af2b09c957ace60dcfac112b669c45c8c97e32f94aa8b56da4c6d1682825/python_dateutil-2.7.3-py2.py3-none-any.whl (211kB) 100% |████████████████████████████████| 215kB 7.2MB/s Collecting kiwisolver>=1.0.1 (from matplotlib) Downloading https://files.pythonhosted.org/packages/79/d8/94633718f3f77dcb638687a77ba199325a1cb158d2d4b00c9dc17f2b5c72/kiwisolver-1.0.1-cp27-cp27m-macosx_10_6_intel.macosx_10_9_intel.macosx_10_9_x86_64.macosx_10_10_intel.macosx_10_10_x86_64.whl (110kB) 100% |████████████████████████████████| 112kB 5.9MB/s Collecting cycler>=0.10 (from matplotlib) Downloading https://files.pythonhosted.org/packages/f7/d2/e07d3ebb2bd7af696440ce7e754c59dd546ffe1bbe732c8ab68b9c834e61/cycler-0.10.0-py2.py3-none-any.whl Requirement not upgraded as not directly required: numpy>=1.7.1 in /usr/local/lib/python2.7/site-packages (from matplotlib) (1.14.5) Requirement not upgraded as not directly required: setuptools in /usr/local/lib/python2.7/site-packages (from kiwisolver>=1.0.1->matplotlib) (39.2.0) Installing collected packages: pyparsing, backports.functools-lru-cache, subprocess32, pytz, python-dateutil, kiwisolver, cycler, matplotlib Successfully installed backports.functools-lru-cache-1.5 cycler-0.10.0 kiwisolver-1.0.1 matplotlib-2.2.2 pyparsing-2.2.0 python-dateutil-2.7.3 pytz-2018.4 subprocess32-3.5.2 liumiaocn:tmp liumiao$
确认
liumiaocn:~ liumiao$ pip show matplotlib Name: matplotlib Version: 2.2.2 Summary: Python plotting package Home-page: http://matplotlib.org Author: John D. Hunter, Michael Droettboom Author-email: matplotlib-users@python.org License: BSD Location: /usr/local/lib/python2.7/site-packages Requires: pyparsing, backports.functools-lru-cache, subprocess32, pytz, six, python-dateutil, kiwisolver, cycler, numpy Required-by: liumiaocn:~ liumiao$
使用
正弦函数
我们使用numpy和matplotlib可以非常简单地就能够画出正弦的波形图,具体代码如下:
liumiaocn:plot liumiao$ cat plot-1.py #!/usr/local/bin/python import numpy as np import matplotlib.pyplot as plot print("y=sin(x): x with range fo -4pi to 4pi") x=np.arange(-4*np.pi, 4*np.pi, 0.1) y=np.sin(x) #print sin plot.plot(x,y) plot.show() liumiaocn:plot liumiao$
执行&结果确认
liumiaocn:plot liumiao$ python plot-1.py y=sin(x): x with range fo -4pi to 4pi
直方图
最简单的直方图的做法,可以通过bar或者hist来创建
liumiaocn:plot liumiao$ cat plot-2.py import numpy as np import matplotlib.pyplot as plt x = np.arange(7) y = (10,15,24,7,14,30,20) plt.bar(x,y) plt.show() liumiaocn:plot liumiao$
饼图
使用pie函数创建饼图
liumiaocn:plot liumiao$ cat plot-3.py #!/usr/local/bin/python import matplotlib.pyplot as plt dateinf = '06/01', '06/02', '06/03', '06/04', '06/05', '06/06', '06/07' bugnums = [11,22,7,29,24,15,18] plt.pie(bugnums, labels=dateinf) plt.show() liumiaocn:plot liumiao$
感谢各位的阅读!关于“Python编程深度学习绘图库之matplotlib怎么用”这篇文章就分享到这里了,希望以上内容可以对大家有一定的帮助,让大家可以学到更多知识,如果觉得文章不错,可以把它分享出去让更多的人看到吧!
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