Read Part I to get started with the Python packages and datasets.
You can also find the standard deviation and the variance with the “statistics” package. The Python code is shown below:
import statistics as st
print(“Variance of the Closing price is % s”
print(“Standard Deviation of Closing Price is % s ”
The output is as follows:
Univariate graphical method
Let me ask you a question, have you ever asked a friend for directions to their house and felt confused. Sure they are giving the right directions, “Take a left turn at XYZ Mall and a right at the ABC Bank” etc., but you can’t help feeling that it could be better. What if the friend gives you a map and says they have circled the destination in red.”
Well, the map sounds better right? Most of us are quick to learn something if we have a visual in front of us than plain numbers in a table.
Hence, we will take the earlier example, and do a line plot of the closing price to see the trend in the market.
The Python code is as follows:
import matplotlib.pyplot as plt
You can also use the histogram to see the distribution. We will find the daily returns and plot its histogram.
Let’s see the histogram:
plt.hist(tesla[‘daily_returns’], bins = 5)
Since it is a small data set, we can’t really infer anything meaningful here. In contrast, if we do a histogram of Tesla for the last year, we will find it as follows:
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