PyTorch Tensor to NumPy Array and Back
2021-03-22You can easily convert a NumPy array to a PyTorch tensor and a PyTorch tensor to a NumPy array. This post explains how it works.
TorchVision Transforms: Image Preprocessing in PyTorch
2021-03-19TorchVision, a PyTorch computer vision package, has a great API for image pre-processing in its torchvision.transforms module. This post gives some basic usage examples, describes the API and shows you how to create and use custom image transforms.
NumPy Where: Understanding np.where()
2021-03-03The NumPy where function is like a vectorized switch that you can use to combine two arrays.
Finding the Mode of an Empirical Continuous Distribution
2021-03-02You can find the mode of an empirical continuous distribution by plotting the histogram and looking for the maximum bin.
NumPy All: Understanding np.all()
2021-02-25The np.all() function tests whether all elements in a NumPy array evaluate to true.
Binary Cross Entropy Explained
Posted 2021-02-22 • Updated 2021-03-01A simple NumPy implementation of the binary cross entropy loss function and some intuition about why it works.
Filtering DataFrames with the .query() Method in Pandas
2021-02-19Pandas provides a .query() method on DataFrame’s with a convenient string syntax for filtering DataFrames. This post describes the method and gives simple usage examples.
Linear Interpolation in Python: An np.interp() Example
2021-02-15It’s easy to linearly interpolate a 1-dimensional set of points in Python using the np.interp() function from NumPy.
NumPy Meshgrid: Understanding np.meshgrid()
2021-02-09You can create multi-dimensional coordinate arrays using the np.meshgrid() function, which is also available in PyTorch and TensorFlow. But watch out! PyTorch uses different indexing by default so the results might not be the same.
SageMaker Studio Quick Start
2021-02-08A step-by-step quick start guide for SageMaker Studio. Start a Studio session, launch a notebook on a GPU instance and run object detection inference with a detectron2 pre-trained model.