Show histogram bar outline

Question

df3['a'].plot.hist(color='blue',xlim=(0,1))

I want to know how can it show the line in the histogram figure. Make the top figure showed as bottom figure. Thank you!

Answer 1

Pass the edgecolor argument to hist.

df3['a'].plot.hist(color='blue',
                   edgecolor='black',
                   xlim=(0,1))

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Demo

df = pd.DataFrame(dict(vals=np.random.normal(size=100)))

df.plot.hist(edgecolor='black')