Some time ago (last year actually ?) I had a blast developing a feature for ggforce which had been on my mind for far to long than its limited utility warranted. The idea was to showcase the new facetting extension powers I’d added to ggplot2 by making a facetting function ...

Editor’s Note: The 2017 Chapman University DataFest was held during the weekend of April 21-23. The 2018 DataFest will be held during the weekend of April 27-29. DataFest was founded by Rob Gould in 2011 at UCLA with 40 students. In just seven years, it has grown to 31 sites in three countries. Have ...

Part 9 of 9 in the series Numerical AnalysisSimpson’s rule is another closed Newton-Cotes formula for approximating integrals over an interval with equally spaced nodes. Unlike the trapezoidal rule, which employs straight lines to approximate a definite integral, Simpson’s rule uses the third Lagrange polynomial, to approximate the definite integral... ...

Last week we released an update of the tesseract package to CRAN. This package provides R bindings to Google's OCR library Tesseract. install.packages("tesseract") The new version ships with the latest libtesseract 3.05.01 on Windows and MacOS. Furthermore it includes enhancements for managing language data and using tesseract together with ...

A geographic bubble chart is a straightforward method to visualise quantitative information with a geospatial relationship. Last week I was in Vietnam helping the Phú Thọ Water Supply Joint Stock Company with their data science. They asked me to create … Continue reading → The post Visualising Water Consumption using a Geographic ...

Somebody nice reached out and gave us this wonderful feedback on our new Supervised Learning in R: Regression (paid) video course. Thanks for a wonderful course on DataCamp on XGBoost and Random forest. I was struggling with Xgboost earlier and Vtreat has made my life easy now :). Supervised Learning in ...

Preamble There is a lot of confusion among practitioners regarding the concept of overfitting. It seems like, a kind of an urban legend or a meme, a folklore is circulating in data science or allied fields with the following statement:Applying cross-validation prevents overfitting and a good out-of-sample performance, low ...

In Part 1 and Part 2 of this series, we scraped plane crash data from the web and complemented it with the geocoordinates of departure, crash and intended arrival location. In this third part, we will visualise the data on a map using the leaflet package. library("leaflet") library("geosphere") Again we ...