# Blog

## The PyTorch Softmax Function

Posted 2021-01-29 • Last updated 2021-10-14

You can use the top-level torch.softmax() function from PyTorch for your softmax activation needs.

## Iterating Over Rows in Pandas

Posted 2021-01-29 • Last updated 2021-10-15

When you absolutely have to iterate over rows in a Pandas DataFrame, use the .itertuples() method.

## Installing Packages in a Jupyter Notebook

Posted 2021-01-22 • Last updated 2021-10-15

This post describes a trick for installing/upgrading Python packages in a Jupyter notebook. It’s useful for scratch code, but don’t do this when you need reproducible code.

## The Quick Start Guide to Plotting Histograms in Seaborn

Posted 2021-01-21 • Last updated 2021-10-21

The histplot() function in Seaborn is a great API for plotting histograms to visualize the distribution of your Pandas columns.

## Normalizing Images in PyTorch

Posted 2021-01-15 • Last updated 2021-10-21

You can use the torchvision Normalize() transform to subtract the mean and divide by the standard deviation for image tensors in PyTorch. But it’s important to understand how the transform works and how to reverse it.

## Dropping Columns and Rows in Pandas

Posted 2021-01-14 • Last updated 2021-10-15

There are a few ways to drop columns and rows in Pandas. This post describes the easiest way to do it and provides a few alternatives that can sometimes be useful.

## The Easiest Way to Rename a Column in Pandas

Posted 2021-01-12 • Last updated 2021-10-15

Two easy recipes for renaming column(s) in a Pandas DataFrame.

## Reshaping Arrays: How the NumPy Reshape Operation Works

Posted 2021-01-11 • Last updated 2021-10-21

This post explains how the NumPy reshape operation works, how to use it and gotchas to watch out for.

## NumPy Norm: Understanding np.linalg.norm()

Posted 2021-01-08 • Last updated 2021-10-15

You can calculate the L1 and L2 norms of a vector or the Frobenius norm of a matrix in NumPy with np.linalg.norm(). This post explains the API and gives a few concrete usage examples.

## Scientific Notation in Python and NumPy

Posted 2021-01-04 • Last updated 2021-10-15

Using and suppressing scientific notation in Python and NumPy.

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