Who's above average?
Boolean arrays can be a very powerful way to subset arrays. In this exercise, you will identify the prices that are greater than average from a list of prices.
numpy
is imported as np
and the array prices
is available in your workspace.
This exercise is part of the course
Introduction to Python for Finance
Exercise instructions
- Find elements in
prices
that are greater thanprice_mean
and assign the boolean result toboolean_array
. - Subset
prices
usingboolean_array
and assign the result toabove_avg
.
Hands-on interactive exercise
Have a go at this exercise by completing this sample code.
# Find the mean
price_mean = np.mean(prices)
# Create boolean array
boolean_array = (____)
print(boolean_array)
# Select prices that are greater than average
above_avg = prices[____]
print(above_avg)