why two points can't show in the figure (matplotlib)?
Question: Figure1 show data points[1](http://i.stack.imgur.com/j7b9r.png)

[1](http://i.stack.imgur.com/j7b9r.png):[![enter image description
here](http://i.stack.imgur.com/j7b9r.png)](http://i.stack.imgur.com/j7b9r.png)

I drawed the figure by matplotlib in python, but the data points cannot be
fully displayed. There are two points not displayed the lower-right corner of
the figure.The two coordinates are (-0.6731984257692413, 6.0),
(-0.7105983383119769, 7.0).I don't know why.Anyone could help?

    
    
    import matplotlib.pyplot as plt
    theta = [0.8975979010256552, 2.6927937030769655, 0, -0.6731984257692413, 0.0, -1.7951958020513104, -0.8975979010256552, -1.7951958020513104, -2.6927937030769655, -0.5235987755982988, -0.59839860068377, -0.8975979010256552, -1.1967972013675403, 1.7951958020513104, -0.5609986881410344, -0.59839860068377, -0.6357985132265057, -0.7105983383119769]
    r = [1.0, 0.5, 0, 6.0, 1.0, 1.5, 1.0, 1.0, 1.0, 4.5, 4.0, 4.0, 4.0, 0.5, 4.5, 4.5, 4.5, 7.0]
    colors = [1.13290242331, 0.81108163706000003, 0, 0.94180655750400011, 0.90356396220000001, 0.946707749135, 1.09650064153, 1.2068422679700002, 1.1150923324999999, 2.4619798379700004, 0.83030335877799999, 0.87957520389799992, 0.872155341769, 0.92537488526299994, 2.70431872671, 1.10024483211, 0.89817718522000012, 1.1547139643100002]
    
    plt.subplot(111,polar=True)
    cc=plt.scatter(theta,r,c=colors,cmap=plt.cm.hsv)
    
    cc.set_alpha(0.75)
    plt.grid(color='y', alpha=0.8, linestyle='dashed', linewidth=1)
    plt.colorbar()
    plt.thetagrids([30])
    plt.show()
    


Answer: With the help of Andras Deak, I use `plt.ylim([0, max(r)+1])`to solve this
problem.Thanks.

