python matplotlib example

1, matplotlib Library IntroductionExcellent visualization of third-party librariesMatplotlib Library is composed of various visual classes, the internal structure is complex and is inspired by Matlab Matplotlib.pyplot is a command sub-library that draws all kinds of visual graphics, equivalent to a shortcutImport Matplotlib.pyplot as PltImport Matplotlib.pyplot as Pltplt.plot ([3,1,4,5,2]) Plt.ylabel (' Grade ') plt.show ()　　Getting Started with

Introducing Class LibrariesImport Matplotlib as Mpl Import Tushare as TS Import Matplotlib.pyplot as Plt Import Matplotlib.finance as MPF from Import RC from Import Date2num from Import datetime, TimedeltaSet the time to take the K lineToday = DateTime.Now (). Strftime ('%y-%m-%d'= (DateTime.Now ()-Timedelta (days = ). Strftime ('%y-%m-%d'#120 Nature Day, about 80 trading daysGet Market data# get market data, format: Pandas.core.frame.DataFrame ' 0

Python matplotlib module, a drawing tool library for extended Matlab, that can draw a variety of graphicsIt is recommended to install Anaconda after use, integration of a lot of third library, basically meet the needs of everyone, the corresponding choice Python 2.7 or 3.5 of the can: https://www.continuum.io/downloads#windows 脚本默认执行方式：1.获取当前文件夹下

Installed is anaconda, which contains NumPy, scipy, matplotlib and other scientific computing packagesHttps://www.continuum.io/downloadsOpen python in Anaconda in terminal/home/qi/anaconda/bin/python>>> from matplotlib import pyplot as pl>>> import numpy as np>>> from scipy import interpolategt;>> x = Np.linspace ( -10

The example in this article describes how Python uses matplotlib to draw a rectangle in a coordinate system. Share to everyone for your reference. The implementation methods are as follows: ? 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 Import Matplotlib.pyplot as Plt from matplotlib.patches import Rectangle class Anno

The example in this article describes how Python implements a line cursor between two axes in matplotlib. Share to everyone for your reference. Specifically as follows: Take a look at the following examples and effects. ? 1 2 3 4 5 6 7 8 9 10 11 12-13 #-*-Coding:utf-8-*-from matplotlib.widgets import multicursor to Pylab import figure, show, NP

The following issues were found in Python today:1. After the from matplotlib import Pyplot as PLT, then import cv2Cv2.imshow () is not working, and I don't know why.My workaround now is to use CV2 to read the image and then call Plt.imshow () to display the image without using cv2.imshow () to display the imageThe color space in the CV2 Library of 2.OpenCV is arranged differently from the color space in the

Python + matplotlib implement filling spiral instance, pythonmatplotlib Filling spiral Demonstration Result: Instance code: Import matplotlib. pyplot as pltimport numpy as nptheta = np. arange (0, 8 * np. pi, 0.1) a = 1b =. 2for dt in np. arange (0, 2 * np. pi, np. pi/2.0): x = a * np. cos (theta + dt) * np. exp (B * theta) y = a * np. sin (theta + dt) * np.

Matplotlib is supported by Unicode encoding, the problem with figure 1 is that no suitable Chinese fonts are found, and there are two solutions: 1. Directly modify the configuration file Matplotlibrc I have not tried this method, because I installed Python (x,y), the location of the configuration file is not necessarily consistent, so I chose the following method 2. Dynamically set in code (recommended meth

': ' #4169E1 ', ' SaddleBrown ': ' #8B4513 ', ' Salmon ': ' #FA8072 ', ' sandybrown ': ' #FAA460 ', ' seagreen ': ' #2E8B57 ', ' seashell ': ' #FFF5EE ', ' Sienna ': ' #A0522D ', ' Silver ': ' #C0C0C0 ', ' skyblue ': ' #87CEEB ', ' slateblue ': ' #6A5ACD ', ' slategray ': ' #708090 ', ' Snow ': ' #FFFAFA ', ' springgreen ': ' #00FF7F ', ' Ste Elblue ': ' #4682B4 ', ' tan ': ' #D2B48C ', ' teal ': ' #008080 ', ' Thistle ': ' #D8BFD8 ', ' tomato

Today is too late, refer to the link first put here, tomorrow, according to their actual situation as a whole, http://www.cnblogs.com/qianlifeng/archive/2012/02/13/2350086.htmlActually encountered the source code as an example affixed.# Show your cluster only available with 2-d data#centroids为k个类别, which holds the centroid of each category#clusterAssment为样本的标记, the first column is the category number for this sample, and the second is the distance to

Matplotlib is a very powerful Python module for drawing two-dimensional graphics, it uses the Python language to achieve the ease of use of MATLAB drawing functions, but also has a very strong customizable. It provides a complete set of command APIs similar to those of MATLAB and is ideal for interactive mapping. It can also be easily used as a drawing control, e

After the installation of Python, the library installed a lot of detours, looked up a lot of information, finally installed successfully, and saved the address of the article, share to everyoneMy Computer windows 7, 64-bit system, the installation of Python is 3.5, so the downloaded library is also the corresponding version of theInstallation method: Same as command line prompt, installation suffix is. whl

function : Python draw 2D graphDirectly on the code, the comments are very detailed!1 #-*-coding:utf-8-*-2 3 fromNumPyImport*4 ImportMatplotlib.pyplot as Plt5 6A=array ([0,0]); B=array ([[1,0],[0,1]])7 #generates a as mean, B is the covariance matrix, and satisfies the random number of the normal distribution8C1=random.multivariate_normal (a,b,10)#10*29C2=random.multivariate_normal (a+0.1,b+0.1,20)#20*2TenC2=mat (C2)#This is done just to illustrate t

Python + matplotlib implements the gorgeous text box DEMO code, pythonmatplotlibGorgeous text box demonstration First, let's take a look at the demo results: Implementation Code Import matplotlib. pyplot as pltplt. text (0.8, 0.5, "python", size = 50, rotation = 30 ., ha = "center", va = "center", bbox = dict (box

Windows:1, cmd under the installation of Pip VirtualenvPip Install Virtualenv2. Create a virtual environment:CD My_project_folderVirtualenv venv #可以指定Python解释器, $ virtualenv-p/usr/bin/python2.7 venv, which will be used /usr/bin/python2.7 in the Python interpreter. 3. Activating the virtual environment:C:\python27\scripts\env\scripts>activate.bat4. Install packages as usual, such as:PIP Install requests5. If

]). showimg () Syzimgs = Myimagen (syz) # syzimgs.showimg () syzimgs.processimage (0, Picgray) Syzimgs.processimage (1, Picgray) # syzimgs.processimage (2, Picgray) Syzimgs.printinfos () syzimgs.showimg ()　　#-*-Coding:utf-8-*-import Matplotlib.pyplot as Pltimport numpy as Npfig = Plt.figure (figsize= (8, 4)) Ax1 = FIG.ADD_SUBP Lot (2,2,1) ax2 = Fig.add_subplot (2,2,2) ax3 = Fig.add_subplot (2,1,2) Ax3.plot (Np.random.randn (). Cumsum (), ' k--') Ax1.hist (NP.RANDOM.RANDN (+), bins=10, color= ' B

[0, 1].plot (data[0], data[1]) OneAxs[1, 1].HIST2D (data[0], data[1]) A -Plt.show ()5. Add Text: Axis label, property label1 ImportMatplotlib.pyplot as Plt2 ImportNumPy as NP3Mu, sigma = 100, 154x = mu + sigma * NP.RANDOM.RANDN (10000)5 6 #The histogram of the data7N, bins, patches = plt.hist (x, Normed=true, facecolor='g', alpha=0.75)8 9 TenPlt.xlabel ('Smarts') OnePlt.ylabel ('probability') APlt.title ('Histogram of IQ') -Plt.text (. 025, R'$\mu=100,\ \sigma=15$')#Support Latex Format -Plt.ax

It is tedious to use numpy to learn statistical calculations, and a lot of data makes us very headache, so we need to visualize it graphically.Matplotlib is a Python graphics framework, similar to the MATLAB and R languages.Matplotlib's official website address is http://matplotlib.org/, for http://matplotlib.org/downloads.html, select the corresponding version can be installed, I choose the version for Matplotlib