FAQ: Introduction to NumPy - Two-Dimensional Arrays

This community-built FAQ covers the “Two-Dimensional Arrays” exercise from the lesson “Introduction to NumPy”.

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This exercise can be found in the following Codecademy content:

Data Science

Introduction to Statistics with NumPy

FAQs on the exercise Two-Dimensional Arrays

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Why doesn’t this code work here:

coin_toss_again = np.array([[coin_toss],[0,0,1,1,1]])

If you remove the brackets around ‘coin_toss’ it will work. ‘coin_toss’ does not need brackets as it is already an array/list.

Why does it matter that the results of ‘coin_toss’ goes first in the new array? I was stumped on why my code didn’t work and the solution was that it was because I had the result of ‘coin_toss’ listed as the 2nd part of the array.

Hi,

When using np.array to create a list of lists and printing the result afterwards, do I need to insert the list() function within the print statement?

new_array = np.array([[92, 94, 88, 91, 87], [79, 100, 86, 93, 91], [87, 85, 72, 90, 92]])

print(new_array) OR print(list(new_array)) — I do not understand when list() needs to be in the print statement…

Grateful for any advice, thanks!