Why ROC curves are a bad idea to explain your model to business people Summary In this blog we explain four most valuable evaluation plots to assess the business value of a predictive model. These plots are the cumulative gains, cumulative lift, response and cumulative response. Since these visualisations are ...

GHCN  version 4   beta is available.  Using the GHS  population dataset the ~27000  GHCNV4 sites were filtered  to collect only rural stations.   GHS  combines two datasets,  a  10meter  built surface  satellite dataset and a human population dataset.   https://ghsl.jrc.ec.europa.eu/.    using site locations the population within 10km  of the ...

The database of Open Street Maps Recently I created a map of the distribution of gas stations and electric charging stations in Europe. Population density through the number of gas stations in Europe. #dataviz @AGE_Oficial @mipazos @simongerman600 @openstreetmap pic.twitter.com/eIUx2yn7ej— Dominic Royé (@dr_xeo) February 25, 2018 ...

Introduction In this post, we will learn to work with date/time data in R using lubridate, an R package that makes it easy to work with dates and time. Let us begin by installing and loading the pacakge. Libraries, Code & Data We will use the following packages: lubridate dplyr ...

Congressional data sources Scraping tweets via rtweet Twitter followers & political ideology Shared tweets as ideology Summary Postscript: News media ideologies Resources In this post, we consider some fairly recent studies conducted by folks at the Washington Post and the Pew Research Center that investigate the relationship between political ideology — as ...

An Election Probability Riddler Classic, Just in Time for November 6 two math puzzles to end your week right: https://t.co/ty6CpcrWXK pic.twitter.com/9EnPlGbwEt— Oliver Roeder (@ollie) November 2, 2018 This week’s FiveThirtyEight Riddler Classic was about winning elections, fair and square, or by any means necessary… In ...

And here is Le Monde mathematical puzzle  last competition problem Find the number of integers such that their 15 digits are all between 1,2,3,4, and the absolute difference between two consecutive digits is 1. Among these numbers how many have 1 as their three-before-last digit and how many have 2? Combinatorics!!! While it seems like […]

Introduction Writing appealing interactive web applications – one of STATWORX's many competences – is an ease with R shiny. Just a few lines of code in one R script create the whole logic you need to let the whole magic of shiny happen. It is so simple that you can make a ...

We have our latest note on the theory of data wrangling up here. It discusses the roles of “block records” and “row records” in the cdata data transform tool. With that and the theory of how to design transforms, we think we have a pretty complete description of the system.

The line plot is the go-to plot for visualizing time-series data (i.e. measurements for several points in time) as it allows for showing trends along time. Here, we’ll use stock market data to show how line plots can be created using native R, the MTS package, and ggplot. ...

Automatically map complex operations safely or quietly, and quickly see the captured side effects.

R is an amazing tool to perform advanced statistical analysis and create stunning visualizations. However, data scientists and analytics practitioners do not work in silos, so these analysis have to be copied and emailed to senior managers and partners teams. Cut-copy-paste sounds great, but if it  is a daily or ...

Introducing Webhooks — Fastest Way to Collect DataToday we’re introducing webhooks, the fastest way you can send data to a JSON file from anywhere.The number 1 most taxing task when it comes to data analysis or taking an initiative to become m...