python+numpy+scipy=matlab,拋棄matlab

本文主要介紹如何利用python實現matlab的功能，實現這個功能要用到python的三個第三方庫，基於的操做系統是archlinux。其餘的系統也是一樣的方法。

安裝

• pyhton:就到官網下載安裝，不少linux下是自己就安裝的。

• linux系統安裝numpy,scipy,matplotlib以下：

  <!--lang: shell-->
    #archlinux系統下
    pacman -S python-numpy python-scipy python-matplotlib 
    #ubuntu系統下    
    sudo apt-get install python-numpy python-scipy python-matplotlib

• windows系統安裝numpy,scipy,matplotlib以下： 到Unofficial Windows Binaries for Python Extension Packages中找到相應的版本 的三個軟件安裝便可，具體過程和全部的windows安裝同樣

實例

建立一個python的腳本，將下面代碼複製好，運行後你會看到美麗的畫面：

• 代碼以下：

  <!--lang: python-->
    #!/usr/bin/env python
  
    """
    Show how to make date plots in matplotlib using date tick locators and
    formatters.  See major_minor_demo1.py for more information on
    controlling major and minor ticks
    """
    from __future__ import print_function
    import datetime
    from pylab import figure, show
    from matplotlib.dates import MONDAY
    from matplotlib.finance import quotes_historical_yahoo
    from matplotlib.dates import MonthLocator, WeekdayLocator, DateFormatter
  
    date1 = datetime.date( 2002, 1, 5 )
    date2 = datetime.date( 2003, 12, 1 )
  
    # every monday
    mondays   = WeekdayLocator(MONDAY)
  
    # every 3rd month
    months    = MonthLocator(range(1,13), bymonthday=1, interval=3)
    monthsFmt = DateFormatter("%b '%y")
  
    quotes = quotes_historical_yahoo('INTC', date1, date2)
    if len(quotes) == 0:
        print ('Found no quotes')
        raise SystemExit
  
    dates = [q[0] for q in quotes]
    opens = [q[1] for q in quotes]
  
    fig = figure()
    ax = fig.add_subplot(111)
    ax.plot_date(dates, opens, '-')
    ax.xaxis.set_major_locator(months)
    ax.xaxis.set_major_formatter(monthsFmt)
    ax.xaxis.set_minor_locator(mondays)
    ax.autoscale_view()
    #ax.xaxis.grid(False, 'major')
    #ax.xaxis.grid(True, 'minor')
    ax.grid(True)
  
    fig.autofmt_xdate()
  
    show()

• 運行結果：