`np.sum(values)` returns `nan`, while `np.nansum(values)` returns `80.0` for the same array. I find that contrast useful because it shows how skipping a missing value changes a reduction. You’ll be able to decide whether a calculation should keep or skip missing…
I have used sklearn’s train_test_split more times than I can count. But every now and then I run into a situation where I cannot install sklearn – maybe it is a restricted environment, maybe I am working on a pure…
I keep coming back to the MNIST dataset when I need to quickly test image processing pipelines or validate that a model architecture is actually learning. It is the hello world of machine learning datasets, and after working with it…
OpenCV is the standard library for computer vision in Python. The cv2.imread() function loads an image from a file and returns a NumPy array. Every image processing pipeline starts here, because you cannot transform pixels you have not read into…
Mean and standard deviation are the two statistics you reach for first when you need to understand a dataset. Mean tells you where the center of your data sits. Standard deviation tells you how tightly or loosely the values cluster…
Just like 2-Dimenstional plots you can also create 3-Dimensional plots in Python using matplotlib. In this tutorial, we will learn how to plot 3-Dimensional plots using matplotlib. How to Plot 3-Dimensional Plots in Python? We will be using the mplot3d…
In this tutorial, we will learn how to plot geographical data on a map using Python Plotly. For this demonstration, we’ll plot COVID-19 cases from ourworldindata.org dataset. Steps to Plot Geographical Data on a Map in Python Let’s get started.…
In this tutorial, we will learn how to remove stop words from a piece of text in Python. Removing stop words from text comes under pre-processing of data before using machine learning models on it. What are stop words? Stop…
A treemap in Python is a visualization of data that splits a rectangle into sub-parts. The size of each subpart is in proportion to the data it represents. It is somewhat like a pie-chart. Although, treemaps can represent much-more complex…