히트맵(heatmap) 그리기

히트맵 그리기 (Heatmap by python matplotlib, seaborn, pandas)
https://rfriend.tistory.com/419 [R, Python 분석과 프로그래밍의 친구 (by R Friend)]


How to make a flat list out of list of lists
https://stackoverflow.com/questions/952914/how-to-make-a-flat-list-out-of-list-of-lists

https://github.com/nschloe/perfplot



Saving plots (AxesSubPlot) generated from python pandas with matplotlib's savefig
https://stackoverflow.com/questions/19555525/saving-plots-axessubplot-generated-from-python-pandas-with-matplotlibs-savefi

fig = plot.get_figure()
fig.savefig("output.png")


matplotlib.pyplot will not forget previous plots - how can I flush/refresh?
https://stackoverflow.com/questions/17106288/matplotlib-pyplot-will-not-forget-previous-plots-how-can-i-flush-refresh/17107568

plt.clear()