[Matplotlib-users] Matplotlib - why scatter plot markers are stretched?

[Gopi1616]

I was creating scatter plot using matplotlib with python2.7 script and it
worked totally fine. I then upgraded my python script from python2.7 to 3.6
now and the markers in the plot are stretched, not sure why this is
happening. Please help me with this.
<http://matplotlib.1069221.n5.nabble.com/file/t5171/comparison.png> 

Data:
    table1.index   freq_table1['VarFreq']
                   1    0.2
                   2    0.4
                   3    0.7
                   4    1.0

Code:
        fig = plt.figure(figsize=(20,16))
	ax1 = fig.add_subplot(1,1,1)
	ax1.scatter(table1.index, table1['VarFreq'], color='r', label=VCF1_legend,
marker="*")
	ax1.scatter(table2.index, table2['VarFreq'], color='blue',
label=VCF2_legend, marker="+")
	plt.legend(loc='upper right')
	ax1.set_title('VarFreq correlation, fontsize=20)
	plt.savefig('WESPP_frequency_comparison.png', dpi=600 )



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Sent from: http://matplotlib.1069221.n5.nabble.com/matplotlib-users-f3.html