Posts Tagged ‘ graphics ’

Making inferences about unusual population quantities.

April 5, 2014
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Making inferences about unusual population quantities.

This post builds on my last: Alternatives to model diagnostics for statistical inference?, where I had claimed that we could make quality inferences about the best linear approximation to a quadratic relationship. The R code below implements such a scenario, to establish a framework for discussion. I have inserted comments to augment the code. set.seed(42) […]

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Image CGI with R

March 24, 2014
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I received an email recently with a question about using R in the common gateway interface (CGI) framework to create and pass image data to the web browser. I posted to stackoverflow about this some time ago, but had forgotten the details. The trouble is that R's graphics devices only write image data to file, […]

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Stick Figure Function Fun – R

January 31, 2014
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Stick Figure Function Fun – R

I have created a stick figure generating function for the purposes of adding a human figure as a demonstration of scale to some of my graphs as well as potentially emoticons to my shiny/concerto applications.You can change basic graphing parameters li...

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Review: Kölner R Meeting 13 December 2013

December 17, 2013
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Review: Kölner R Meeting 13 December 2013

Last week's Cologne R user group meeting was the best attended so far. Well, we had a great line up indeed. Matt Dowle came over from London to give an introduction to the data.table package. He was joined by his collaborator Arun Srinivasan, who is ba...

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High resolution graphics with R

October 29, 2013
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High resolution graphics with R

For most purposes PDF or other vector graphic formats such as windows metafile and SVG work just fine. However, if I plot lots of points, say 100k, then those files can get quite large and bitmap formats like PNG can be the better option. I just have t...

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JSM 2013 – Tuesday

August 7, 2013
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JSM 2013 – Tuesday

The Joint Statistical Meeting in Montreal has proven to be very good.   Here are a few highlight from Tuesday’s sessions.  There is one major problem that exists and that is there are too many good sessions to attend.  During one time block I had six session that I wanted to go to.  Unfortunately, it […]

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Reflections on UseR! 2013

July 12, 2013
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Reflections on UseR! 2013

This week I’ve been at the R Users conference in Albacete, Spain. These conferences are a little unusual in that they are not really about research, unlike most conferences I attend. They provide a place for people to discuss and exchange ideas on how R can be used. Here are some thoughts and highlights of the conference, in no particular order. Håvard Rue spoke on Bayesian computing with INLA and…

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A Recipe for Trellis/Faceted Plots Using Base R Graphics

July 6, 2013
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A Recipe for Trellis/Faceted Plots Using Base R Graphics

I frequently use lattice and ggplot2 to create trellis/faceted graphics. But, I gave up using these packages in a recent application, where I had initially constructed a complex graphic using the base R plotting functions. When I later decided that I wanted a faceted version, there was a dilema: re-create the complex graphic using lattice […]

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The Mechanics of Data Visualization

July 2, 2013
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The Mechanics of Data Visualization

I recently presented about the mechanics of data visualization at the CLaRI Literacy Conference to a group of researchers, teachers and school administrators. The presentation is based on the work of Few (2012; 2009). While the presentation itself is not about … Continue reading →

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Using R to Produce Scalable Vector Graphics for the Web

July 1, 2013
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Using R to Produce Scalable Vector Graphics for the Web

Statistical software is normally used during the analysis stage of a project and a cleaned up static graphic is created for the presentation.  If the presentation is in web format then there are some considerations that are needed. The trick is to find ways to implement those graphs in that web format so the graph […]

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