Tag: R

Feed: Planet PostgreSQL. FOSS4G 2017 is just a few weeks away. Many of the workshops will utilize OSGeoLive as a means for workshop participants to get up and running quickly with OSGeo Free and Open Source GIS tools and Boston data. OSGeoLive11 is a LUbuntu 16.04 distribution. OSGeoLive11 is going thru the final stages of prep. You can download the OSGeoLiveRC1 ISO for it from http://aiolos.survey.ntua.gr/gisvm/11.0/osgeo-live-11.0rc1-amd64.iso. Once OSGeoLive11 is fully prepped, it will be linked on the osgeolive site http://live.osgeo.org. If you want to run OSGeoLive11 from bootable media, you can burn the ISO to DVD or thumb drive and ... Read More

Feed: CDH – Cloudera Engineering Blog. Author: Charles Zedlewski. I’m very pleased to announce the immediate General Availability of CDH4 and Cloudera Manager 4 (part of the Cloudera Enterprise 4.0 subscription).  These releases are an exciting milestone for Cloudera customers, Cloudera users and the open source community as a whole. FunctionalityBoth CDH4 and Cloudera Manager 4 are chock full of new features. Many new features will appeal to enterprises looking to move  more important workloads onto the Apache Hadoop platform. CDH4 includes high availability for the filesystem, ability to support multiple namespaces, Apache HBase table and column level security, improved performance, HBase replication and greatly improved usability ... Read More

Feed: R-bloggers. Author: fishR Blog. There has been a bit of a buzz recently about so-called “joyplots.” Wilke described joyplots as “partially overlapping line plots that create the impression of a mountain range.” I would describe them as partially overlapping density plots (akin to a smoothed histogram). Examples of joyplots are here, here, and here (from among many). I thought that joyplots might provide a nice visualization of length frequencies over time. For example, we have a paper forthcoming in the North American Journal of Fisheries Management that examines (among other things) the lengths of Kiyi (Coregonus kiyi) captured in ... Read More

Feed: R-bloggers. Author: David Smith. The foreach package provides a simple looping construct for R: the foreach function, which you may be familiar with from other languages like Javascript or C#. It's basically a function-based version of a "for" loop. But what makes foreach useful isn't iteration: it's the way it makes it easy to run those iterations in parallel, and save time on multi-CPU and distributed systems. If you want to get familiar with the foreach function, Parallelizing Loops at Microsoft Docs will introduce you to foreach oops (and the companion concept, iterators), and the various "backends" you can use ... Read More

Feed: R-bloggers. Author: R Views. I am very much looking forward to attending JSM which begins this Sunday. And once again, I will be spending a good bit of my time hunting for new and interesting applications of R. In years gone by, this was a difficult game at JSM because R, R Package, Shiny, tidyverse and the like did not often turn up in a keyword search. This year, however, there is quite a bit of low hanging fruit. Below twenty-five sessions are listed by their JSM Activity Number. If you are going to the conference, try to work ... Read More

Feed: R-bloggers. Author: Biswarup Ghosh. In the last set of exercises, we worked on the basic concepts of string manipulation with stringr. In this one we will go further into hacking strings universe and learn how to use stringi package.Note that stringi acts as a backend of stringr but have many more useful string manipulation functions compared to stringr and one should really know stringi for text manipulation . Answers to the exercises are available here.If you obtained a different (correct) answer than those listed on the solutions page, please feel free to post your answer as a comment on ... Read More

Feed: R-bloggers. Author: James. There has been a resurgence of interest in data visualizations inspired by Joy Division’s Unknown Pleasures album cover. These so-called “Joy Plots” are easier to create thanks to the development of the “ggjoy” R package and also some nice code posted using D3. I produced a global population map (details here) using a similar technique in 2013 and since then I’ve been on a quest to find some earlier examples. This is because a number of people have said it reminds them of maps created by Harvard’s digital mapping pioneers in the 1970s and I got the feeling I was coming ... Read More

Feed: R-bloggers. Author: The Exactness of Mind. The visualization of complex datasets is of essential importance in communicating your data products.Beyond pie charts, histograms, line graphs and other common forms ofvisual communication begins the reign of data sets that encompass toomuch information to be easily captured by these simple data displays. Atypical context that abounds with complexity is found in the areas oftext mining, natural language processing, and cognitive computing ingeneral; such a complex context for datapresentation is pervasive in an attempt to build a visual interface forproducts like semantic search engines or recommendation engines. Forexample, statistical models like LDA ... Read More

Feed: R-bloggers. Author: Iñaki Úcar. The third update of the 3.6.x release of simmer, the Discrete-Event Simulator for R, is on CRAN. First of all and once again, I must thank Duncan Garmonsway (@nacnudus) for writing a new vignette: “The Bank Tutorial: Part II”. Among various fixes and performance improvements, this release provides a way of knowing the progress of a simulation. This feature is embed into the run() function as a parameter called progress, which accepts a function with a single argument and will be called for each one of the steps (10 by default) with the current progress ratio (a number between 0 and 1) ... Read More

Feed: R-bloggers. Author: Bob Carpenter. Here’s the roundup for this past week. Michael Betancourt added case studies for methodology in both Python and R, based on the work he did getting the ML meetup together: Michael Betancourt, along with Mitzi Morris, Sean Talts, and Jonah Gabry taught the women in ML workshop at Viacom in NYC and there were 60 attendees working their way up from simple linear regression, through Poisson regression to GPs. Ben Goodrich has been working on new R^2 analyses and priors, as well as the usual maintenance on RStan and RStanArm. Aki Vehtari was at the ... Read More