You can plot the histogram in Matplotlib with the following code. If you want to learn Python then I will highly recommend you to read This Book.
x = [1,2,2,2,3,3,4,4,4,4,5,5,5,6,6,10,10,7,7,7,7,7,9,9,9]
plt.title("Histogram")
plt.xlabel("Numbers")
plt.ylabel("Frequency")
plt.hist(x)
plt.show()
You can increase or decrease the number of bins. By default is 10 in Matplotlib. You can also change the color of the histogram.
y = [1,2,2,2,3,3,4,4,4,4,5,5,5,6,6,10,10,7,7,7,7,7,9,9,9]
plt.title("Histogram")
plt.xlabel("Numbers")
plt.ylabel("Frequency")
plt.hist(y,bins=20,color='green')
plt.show()
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