Blog :: Posit Open Source

Representation learning with MMD-VAE

Like GANs, variational autoencoders (VAEs) are often used to generate images. However, VAEs add an additional promise: namely, to model an underlying latent space. Here, we first look at a typical implementation that maximizes the evidence lower bound. Then, we compare it to one of the more recent competitors, MMD-VAE, from the Info-VAE (information maximizing VAE) family

keras3 Machine Learning Ai Tensorflow Keras Unsupervised Learning Image Recognition Image Processing

Oct 22, 2018

Winner takes all: A look at activations and cost functions

Winner takes all: A look at activations and cost functions

Why do we use the activations we use, and how do they relate to the cost functions they tend to co-appear with? In this post we provide a conceptual introduction

keras3 Machine Learning Best Practices Ai Tensorflow Keras Concepts

Oct 11, 2018

More flexible models with TensorFlow eager execution and Keras

More flexible models with TensorFlow eager execution and Keras

Advanced applications like generative adversarial networks, neural style transfer, and the attention mechanism ubiquitous in natural language processing used to be not-so-simple to implement with the Keras declarative coding paradigm. Now, with the advent of TensorFlow eager execution, things have changed. This post explores using eager execution with R

keras3 Machine Learning Ai Tensorflow Keras

Oct 2, 2018

sparklyr 0.9: Streams and Kubernetes

sparklyr 0.9: Spark structured streams for real-time data processing and Kubernetes cluster support

Javier Luraschi

Oct 1, 2018

Data Wrangling MLOps and Admin Spark Sparklyr Streaming Big Data Packages RStudio

Collaborative filtering with embeddings

Embeddings are not just for use in natural language processing. Here we apply embeddings to a common task in collaborative filtering - predicting user ratings - and on our way, strive for a better understanding of what an embedding layer really does

keras3 Machine Learning Ai Tensorflow Keras Tabular Data

Sep 26, 2018

Image-to-image translation with pix2pix

Conditional GANs (cGANs) may be used to generate one type of object based on another - e.g., a map based on a photo, or a color video based on black-and-white. Here, we show how to implement the pix2pix approach with Keras and eager execution

keras3 Machine Learning Ai Tensorflow Keras Image Recognition Image Processing Generative Models

Sep 20, 2018

Radix for R Markdown

Introducing Radix: an R Markdown format optimized for scientific communication with flexible layouts

rmarkdown Publishing R Markdown RStudio

Sep 19, 2018

Attention-based Image Captioning with Keras

Attention-based Image Captioning with Keras

Image captioning is a challenging task at intersection of vision and language. Here, we demonstrate using Keras and eager execution to incorporate an attention mechanism that allows the network to concentrate on image features relevant to the current state of text generation

keras3 Machine Learning Ai Natural Language Processing Tensorflow Keras Image Recognition Image Processing

Sep 17, 2018

Getting started with deep learning in R

Resources for getting started with deep learning in R using Keras and TensorFlow

keras3 tensorflow Machine Learning Packages RStudio

Sep 12, 2018

Neural style transfer with eager execution and Keras

Neural style transfer with eager execution and Keras

Continuing our series on combining Keras with TensorFlow eager execution, we show how to implement neural style transfer in a straightforward way. Based on this easy-to-adapt example, you can easily perform style transfer on your own images

keras3 Machine Learning Ai Tensorflow Keras Generative Models Image Recognition Image Processing

Sep 10, 2018

Getting started with deep learning in R

Many fields are benefiting from the use of deep learning, and with the R keras, tensorflow and related packages, you can now easily do state of the art deep learning in R. In this post, we want to give some orientation as to how to best get started

keras3 Machine Learning Ai Tensorflow Keras

Sep 7, 2018

processx 3.2.0

Run external processes with processx

Gábor Csárdi

Sep 6, 2018

tidyverse processx Rlib Tidyverse Packages

Save the date: tidyverse developer day

Save the date for tidyverse developer day the Saturday following rstudio::conf!

tidyverse Tidyverse-Dev-Day Tidyverse

Aug 27, 2018

Generating images with Keras and TensorFlow eager execution

Generating images with Keras and TensorFlow eager execution

Generative adversarial networks (GANs) are a popular deep learning approach to generating new entities (often but not always images). We show how to code them using Keras and TensorFlow eager execution

keras3 Machine Learning Ai Tensorflow Keras Generative Models Image Recognition Image Processing

Aug 26, 2018

scales 1.0.0

scales 1.0.0 is now on CRAN

Dana Seidel

Aug 9, 2018

tidyverse scales ggplot2 Rlib Tidyverse Packages

ggplot2 3.0.0: community posts

Blog posts from the community using ggplot2 3.0.0

tidyverse ggplot2 Tidyverse

Aug 9, 2018

roxygen2 6.1.0

roxygen2 6.1.0 is now on CRAN!

tidyverse roxygen2 Rlib Tidyverse Packages

Aug 7, 2018

The tidymodels Package

tidymodels 0.0.1 is on CRAN

Max Kuhn

Aug 6, 2018

tidyverse tidymodels Tidyverse Packages

Attention-based Neural Machine Translation with Keras

Attention-based Neural Machine Translation with Keras

As sequence to sequence prediction tasks get more involved, attention mechanisms have proven helpful. A prominent example is neural machine translation. Following a recent Google Colaboratory notebook, we show how to implement attention in R

keras3 Machine Learning Ai Natural Language Processing Tensorflow Keras

Jul 30, 2018

The Revamped bookdown.org Website

The revamped bookdown.org website: browse, search, and contribute books written with bookdown

Yihui Xie

Jul 25, 2018

bookdown Publishing Website R Markdown RStudio News

Tidy evaluation in ggplot2

Using tidy evaluation in ggplot2 3.0.0

Jul 24, 2018

keras3 Machine Learning Ai Tensorflow Keras

Classifying physical activity from smartphone data

Classifying physical activity from smartphone data

Using Keras to train a convolutional neural network to classify physical activity. The dataset was built from the recordings of 30 subjects performing basic activities and postural transitions while carrying a waist-mounted smartphone with embedded inertial sensors

Nick Strayer

Jul 17, 2018

broom 0.5.0

broom 0.5.0 is on CRAN

Alex Hayes

Jul 17, 2018

tidyverse broom tidymodels Tidyverse Packages

Announcing the R Markdown Book

Announcing R Markdown: The Definitive Guide, a comprehensive book on R Markdown and its extensions

Yihui Xie

Jul 13, 2018

rmarkdown Publishing Book R Markdown RStudio

Carpe Talk

Seize the day and show off your work!

Jenny Bryan, Mara Averick

Jul 8, 2018

Tidyverse

ggplot2 3.0.0

ggplot2 3.0.0 is on CRAN

Jul 5, 2018

haven 1.1.2

haven 1.1.2 is now on CRAN

tidyverse haven Tidyverse Packages

Jun 28, 2018

bench 1.0.1

bench 1.0.1 is now available on CRAN. bench allows you to benchmark code, by tracking execution time, memory allocations and garbage collections

Jim Hester

Jun 28, 2018

tidyverse bench Rlib Tidyverse Packages

Shiny 1.1.0: Scaling Shiny with async

Shiny 1.1.0: async programming support via future and promises for better scalability under load

Joe Cheng

Jun 26, 2018

Shiny Interactive Apps Async Shiny Packages RStudio

Predicting Sunspot Frequency with Keras

In this post we will examine making time series predictions using the sunspots dataset that ships with base R. Sunspots are dark spots on the sun, associated with lower temperature. Our post will focus on both how to apply deep learning to time series forecasting, and how to properly apply cross validation in this domain

Matt Dancho, Sigrid Keydana

Jun 25, 2018

keras3 Machine Learning Ai Tensorflow Keras Time Series

The tidyverse is for EDA, not packages

Why the tidyverse package shouldn’t be in your dependencies

keras3 Machine Learning Ai Tensorflow Keras Audio Processing

Jun 20, 2018

tidyverse Tidyverse

Digitally produced spectrogram of a male voice saying `nineteenth century`

Simple Audio Classification with Keras

In this tutorial we will build a deep learning model to classify words. We will use the Speech Commands dataset which consists of 65,000 one-second audio files of people saying 30 different words

Daniel Falbel

Jun 6, 2018

dplyr 0.7.5

dplyr 0.7.5 has reached CRAN. This is mostly a bugfix release with two important new changes

Kirill Müller, Romain François, Hadley Wickham

Jun 6, 2018

tidyverse dplyr Tidyverse Packages

pkgdown 1.1.0

pkgdown 1.1.0 is now on CRAN

tidyverse pkgdown Rlib Tidyverse Packages

Jun 5, 2018

conflicted: a new approach to resolving ambiguity

conflicted: a new approach to resolving ambiguity

tidyverse conflicted Rlib Tidyverse Packages

Jun 2, 2018

ggplot2 2.3.0 — upcoming release

What you need to know about upcoming changes for ggplot2 2.3.0

May 21, 2018

Data Wrangling MLOps and Admin Sparklyr Packages RStudio

sparklyr 0.8: Production pipelines and graphs

sparklyr 0.8: production ML pipelines with mleap export and graph analysis with graphframes

Kevin Kuo

May 14, 2018

leaflet 2.0.0

Barret Schloerke

May 10, 2018

leaflet Visualization Interactive Apps Data Visualization Packages RStudio

pkgdown 1.0.0

tidyverse pkgdown Rlib Tidyverse Packages

May 3, 2018

pillar 1.2.2

pillar 1.2.2 is on CRAN now, losing that extra dot for whole numbers and those extra zeros when there’s nothing more to see. If you still prefer the good old data frame output, this post shows how to get it back for tibbles too

Kirill Müller, Hadley Wickham

Apr 30, 2018

tidyverse pillar tibble Rlib Tidyverse Packages

bigrquery 1.0.0

tidyverse bigrquery dbplyr Databases Tidyverse Packages

Apr 24, 2018

readxl 1.1.0

readxl 1.1.0 is now on CRAN

Jenny Bryan

Apr 23, 2018

tidyverse readxl Tidyverse Packages

Arrow and beyond: Collaborating on next generation tools for open source data science

RStudio partners with Ursa Labs to build a cross-language data science runtime powered by Apache Arrow

Data Wrangling Community News Arrow Ursa Labs RStudio

Apr 19, 2018

Upvoting issues

If you go to a GitHub repo to file an issue/request a feature and find an open thread, give it a thumbs up: we are listening!

Apr 12, 2018

Tidyverse

GPU Workstations in the Cloud with Paperspace

GPU Workstations in the Cloud with Paperspace

If you don’t have local access to a modern NVIDIA GPU, your best bet is typically to run GPU intensive training jobs in the cloud. Paperspace is a cloud service that provides access to a fully preconfigured Ubuntu 16.04 desktop environment equipped with a GPU

tensorflow keras3 tfestimators MLOps and Admin Ai Cloud

Apr 2, 2018

DT 0.4: Editing Tables, Smart Filtering, and More

DT 0.4: editable tables, smart filtering, and shift-click row selection for Shiny apps

Yihui Xie

Mar 29, 2018

DT Shiny Visualization Interactive Apps Datatables Shiny Packages RStudio

reticulate: R interface to Python

Introducing reticulate: seamless interoperability between R and Python with automatic type conversion

reticulate Publishing Packages R Markdown Python RStudio

Mar 26, 2018

lime v0.4: The Kitten Picture Edition

A new major release of lime has landed on CRAN. lime is an R port of the Python library of the same name by Marco Ribeiro that allows the user to pry open black box machine learning models and explain their outcomes on a per-observation basis

Thomas Lin Pedersen

Mar 9, 2018

keras3 Machine Learning Ai Packages Releases Tensorflow Keras Explainability Image Recognition Image Processing

rlang 0.2.0

rlang 0.2.0 is on CRAN! This version brings many improvements to tidy evaluation: improved!! syntax and printing of quosures in colours

Lionel Henry

Mar 2, 2018

tidyverse rlang Rlib Tidyverse Packages

pillar 1.2.1

pillar 1.2.1 is on CRAN now, a minor update that tweaks the output of tibbles again

Kirill Müller, Hadley Wickham

Mar 2, 2018

tidyverse pillar tibble Rlib Tidyverse Packages

usethis 1.3.0

usethis 1.3.0 is now on CRAN

Jenny Bryan

Feb 25, 2018

tidyverse usethis Rlib Tidyverse Packages

stringr 1.3.0

stringr 1.3.0 is now on CRAN

tidyverse stringr Tidyverse Packages

Feb 22, 2018

forcats 0.3.0

A new version of forcats is now on CRAN

tidyverse forcats Tidyverse Packages

Feb 21, 2018

tidyr 0.8.0