## Finxter.com Puzzles by Topic

Arithmetic Arithmetic Operations https://app.finxter.com/learn/computer/science/314 Integer Arithmetic https://app.finxter.com/learn/computer/science/381 Python Float Arithmetic https://app.finxter.com/learn/computer/science/320 OOP Basics of OOP https://app.finxter.com/learn/computer/science/527 OOP https://app.finxter.com/learn/computer/science/606 OOP – Representation https://app.finxter.com/learn/computer/science/594 Filter Filter and Recursion https://app.finxter.com/learn/computer/science/493 Set, Lambda, and Filter https://app.finxter.com/learn/computer/science/399 The Filter Function https://app.finxter.com/learn/computer/science/375 DataFrames DataFrames and Datatypes https://app.finxter.com/learn/computer/science/614 DataFrames and Series https://app.finxter.com/learn/computer/science/612 Merging DataFrames https://app.finxter.com/learn/computer/science/621 Add Column To DataFrame https://app.finxter.com/learn/computer/science/616 DataFrame Creation … Read more

## [Numpy * Operator] Element-wise Multiplication in Python

NumPy is a popular Python library for data science. Numpy focuses on array, vector, and matrix computations. If you work with data, you cannot avoid NumPy. So learn it now and learn it well. In this tutorial, you’ll learn how to calculate the Hadamard Product (= element-wise multiplication) of two 1D lists, 1D arrays, or … Read more

## Exploring Shape, Reshape, and Average in Numpy

Daily Data Science Puzzle Β  What is the output of this puzzle? Numpy is a popular Python library for data science focusing on linear algebra. This advanced puzzle combines multiple language concepts and numpy features. The topic is a miniature stock analysis of the Apple stock. The puzzle creates a one-dimensional numpy array from raw … Read more

## Python Numpy 101: How to Calculate the Row Variance of a Numpy 2D Array?

You can play with the following interactive Python code to calculate the variance of a 2D array (total, row, and column variance). Here’s another practical example: What is the output of this puzzle?*Advanced Level* (solution below) Numpy is a popular Python library for data science focusing on arrays, vectors, and matrices. This puzzle introduces a … Read more

## How to Calculate Variance of Python NumPy Arrays?

Numpy is a popular Python library for data science focusing on arrays, vectors, and matrices. Did you already learn something new today? Let’s master the popular variance function in NumPy! Problem: How to calculate the variance of a NumPy array? Solution: To calculate the variance of a Python NumPy array x, use the function np.var(x). … Read more