Tag: R

Feed: Featured Blog Posts - Data Science Central. Author: Jonathan Symonds. TLDR: Neural Networks are powerful but complex and opaque tools. Using Topological Data Analysis, we can describe the functioning and learning of a convolutional neural network in a compact and understandable way. The implications of the finding are profound and can accelerate the development of a wide range of applications from self-driving everything to GDPR.Introduction Neural networks have demonstrated a great deal of success in the study of various kinds of data, including images, text, time series, and many others.  One issue that restricts their applicability, however, is the ... Read More

Feed: R-bloggers. Author: rOpenSci - open tools for open science. Part of rOpenSci’s mission is to create technical infrastructure in the form of carefully vetted R software tools that lower barriers to working with data sources on the web. Our open peer software review system for community-contributed tools is a key component of this. As the rOpenSci community grows and more package authors submit their work for peer review, we need to expand our editorial board to maintain a speedy process. As our recent post shows, package submissions have grown every year since we started this experiment, and we see ... Read More

Feed: Planet big data. Author: David Smith. R is primarily a language for working with numbers, but we often need to work with text as well. Whether it's formatting text for reports, or analyzing natural language data, R provides a number of facilities for working with character data. Handling Strings with R, a free (CC-BY-NC-SA) e-book by UC Berkeley's Gaston Sanchez, provides an overview of the ways you can manipulate characters and strings with R.  There are many useful sections in the book, but a few selections include: Note that the book does not cover analysis of natural language data, ... Read More

Feed: R-bloggers. Author: . As I’ve been blogging more about statistics, R, and research in general, I’ve been trying to increase my online presence, sharing my blog posts in groups of like-minded people. Those efforts seem to have paid off, based on my view counts over the past year: And based on read counts, here are my top 10 blog posts, most of which are stats-related: Beautiful Asymmetry – none of us is symmetrical, and that’s okay  Statistical Sins: Stepwise Regression – just step away from stepwise regression Statistics Sunday: What Are Degrees of Freedom? (Part 1) – and read Part ... Read More

Feed: R-bloggers. Author: filip Schouwenaars. Immediate and personalized feedback has been central to the learning experience on DataCamp since we launched the first courses. If students submit code that contains a mistake, they are told where they made a mistake, and how they can fix this. You can play around with it in our free Introduction to R course. The screenshot below is from our Intermediate R course. To check submissions and generate feedback, every exercise on DataCamp features a so-called Submission Correctness Test, or SCT. The SCT is a script of custom tests that assesses the code students submitted ... Read More

Feed: Google Cloud Big Data and Machine Learning Blog. Author: Google Cloud Big Data and Machine Learning Blog Team. Innovation in data processing and machine learning technology How RealtimeCRM built a business card reader using machine learning Friday, June 22, 2018 By Ben Miles, Head of Product, RealtimeCRM Lately, we at RealtimeCRM have attended a lot of networking events, and invariably we take home a small mound of business cards. Due to our own procrastination, the mound grows bigger and bigger until it consumes a sizeable chunk of desk space, at which point we finally take it on. The problem ... Read More

Feed: R-bloggers. Author: sindri. Datasets often arrive to us in a form that is different from what we need for our modelling or visualisations functions who in turn don’t necessary require the same format. Reshaping data.frames is a step that all analysts need but many struggle with. Practicing this meta-skill will in the long-run result in more time to focus on the actual analysis. The solutions to this set will rely on data.table, mostly melt() and dcast() which are originally from the reshape2 package. However, you can also get practice out if it using your favourite base-R, tidyverse or any ... Read More

Feed: R-bloggers. Author: Blog-rss on stevenmortimer.com. I recently wrote a blog post here comparing the number of CRAN downloads an R package gets relative to its number of stars on GitHub. What I didn’t really think about during my analysis was whether or not scraping CRAN was a violation of its Terms and Conditions. I simply copy and pasted some code from R-bloggers that seemed to work and went on my merry way. In hindsight, it would have been better to check whether or not the scraping was allowed and maybe find a better way to get the information I ... Read More

Feed: R-bloggers. Author: Dr. Shirin Glander. Last week I published a blog post about how easy it is to train image classification models with Keras. What I did not show in that post was how to use the model for making predictions. This, I will do here. But predictions alone are boring, so I’m adding explanations for the predictions using the lime package. I have already written a few blog posts (here, here and here) about LIME and have given talks (here and here) about it, too. Neither of them applies LIME to image classification models, though. And with the ... Read More

Feed: R-bloggers. Author: Chuck Powell. Presenting data results in the most informative and compelling manner is part of the role of the data scientist. It's all well and good to master the arcana of some algorithm, to manipulate and master the numbers and bend them to your will to produce a “solution” that is both accurate and useful. But, those activities are typically in pursuit of informing some decision or at least providing information that serves a purpose. So taking those results and making them compelling and understandable by your audience is part of your job! This article will focus ... Read More