3744 search results for "GIS"

The joy of joining data.tables

June 9, 2014
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The joy of joining data.tables

The example I present here is a little silly, yet it illustrates how to join tables with data.table in R. Mapping old data to new dataCategories in general are never fixed, they always change at some point. And then the trouble starts with the data. For example not that long ago we didn't distinguish between smartphones and dumbphones,...

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slumping model

June 8, 2014
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slumping model

Introduction I got interested in layered sedimentation from viewing a video and decided it would be interesting to code this into R. More on that in due course, but my first step was to code a syatem with one sediment “type”. Procedure The following code drops sediment particles at x=1, and lets them roll downhill until they reach the bottom or...

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stone flakes

June 6, 2014
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stone flakes

I browsed through UC Irvine Machine Learning Repository! the other day and noticed a nice data set regarding stone flakes produced by our ancestors, the prehistoric men. To quote the dataset owners:'The data set concerns the earliest history ...

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rCharts Parcoords x Simpsons x Blocks

June 6, 2014
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rCharts Parcoords x Simpsons x Blocks

Interactive Parallel Coordinates with Multiple ColoursFor my research project, I need a tool to visualise results from multi-objective optimisations. Below is one of my early attempts using base R and parcoord in the MASS package, I have no problem using them for publication. However, these charts are all static. For...

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A simple workflow for using R with Microsoft Office products

June 5, 2014
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A simple workflow for using R with Microsoft Office products

The challenge of integrating Microsoft products with R software has been an outstanding issue for several years. Reasons for these issues are complicated and related to fundamental differences in developing proprietary vs open-source products. To date, I don’t believe there has been a satisfactory solution but I present this blog as my attempt to work

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str Implementation for Data Frames

June 5, 2014
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The str function is perhaps the most useful function in R. It provides great information about the structure of some object. When I teach R, especially for those coming from SPSS, the str function for data frames provides the information they are use to seeing on the variable view tab. However, sometimes I want to display the information str...

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The 7th China R Conference in Beijing

June 4, 2014
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The 7th China R Conference in Beijing

The 7th China R Conference in Beijing was held on May 24th ~May 25th in Renmin University of China. SupStat is really happy and honored to sponsor and attend this meeting. This is the largest ever R conference in China with 1814 registrations online and even 50 more requests of attendance with the help of special... Read more »

Introducing RPushbullet

A new package of mine appeared on CRAN today: RPushbullet. A few days ago, I had tweeted about a first version available via its GitHub repo. The package is now on CRAN which will make it easier to install for many. You still need an API key (free,...

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Colourful Ecology Part 1: Selecting colours for scientific figures from an image using community ecology methods

June 3, 2014
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Colourful Ecology Part 1: Selecting colours for scientific figures from an image  using community ecology methods

(This article was first published on rstats - MetaEvoPhyloEcoOmics, and kindly contributed to R-bloggers) It used to be that I would make all my figures in black and white. It was just simpler that way, since most print journals charged extra money to print colour figures, and I did not have any money to spare. But with the move...

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useR! 2014 conference update

June 2, 2014
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The useR! 2014 conference promises to be the biggest yet, with more than 500 registrations already. But there's room for plenty more R users! Check out the update from the organizing committer below, and if you haven't already done so, register for the conference at the useR! 2014 website. We are exactly one month away from the useR! 2014...

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