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  • matplotlib locators

    2020-03-23 17:59:59  -- Edit by yangray

    The Locator class is the base class for all tick locators. The locators
    handle autoscaling of the view limits based on the data limits, and the
    choosing of tick locations.
    --- matplotlib document

    Tips: To control the major and minor tick label formats, use one of the
    following methods::
    ax.xaxis.set_major_formatter(xmajor_formatter)
    ax.xaxis.set_minor_formatter(xminor_formatter)
    ax.yaxis.set_major_formatter(ymajor_formatter)
    ax.yaxis.set_minor_formatter(yminor_formatter)


    Figure without locator:

    #!/usr/bin/python
    # _*_ Coding: Utf-8 _*_
    
    import matplotlib.pyplot as plt
    import numpy as np
    import random
    from matplotlib.ticker import *
    
    t = [str(i) for i in range(40)]
    s = [36 + random.randint(0, 8) for i in range(40)]
    
    fig, axes = plt.subplots()
    
    axes.plot(t, s, 'go-', markersize=1, linewidth=0.6)
    axes.tick_params(axis='x', labelsize=8)  # tick_params
    axes.set_xticks(t)  # set ticks
    
    plt.show()
    
    
    • MaxNLocator
    
    

        Select no more than N intervals at nice locations. default_params = dict(nbins=10, steps=None, integer=False, symmetric=False, prune=None, min_n_ticks=2)

    
    

    maxNLocator = MaxNLocator(nbins=8)  # max N (divisions)
    

     

    maxNLocator = MaxNLocator(steps=[1, 2, 4, 5, 10])  # where the values are acceptable tick multiples
    

     

    maxNLocator = MaxNLocator(min_n_ticks=5) # minimum number of ticks

       other params: [integer]  If True, ticks will take only integer values

             [symmetricIf True, autoscaling will result in a range symmetric about zero

             [prune] ['lower' | 'upper' | 'both' | None]  Remove edge ticks
    • MultipleLocator

      

    multipleLocator = MultipleLocator(6)  # Set a tick on each integer multiple of a base within the view interval
    
    • FixedLocator

    fixedLocator = FixedLocator([1, 3, 5, 7, 15], nbins=7)  # fixed index (ticks <= nbins +1)
    
    • IndexLocator

    indexLocator = IndexLocator(5, 2)  # 
    
    • AutoMinorLocator

    autoMinor = AutoMinorLocator(5)  # generate minor locs with the number of subdivisions (must be on linear type locator)
    
      
    
    
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  • 原文地址:https://www.cnblogs.com/exploer/p/12553881.html
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