156 search results for "heatmap"

S&P 500 components heatmap in R

October 12, 2011
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S&P 500 components heatmap in R

In this article, Hans Gilde exposes the clever use of a heatmap hidden in the Bioconductor library. In his example, he describes a way to show different ‘observations’ on subjects, with the concept of time. Financial indices, like the S&P 500 or the Dow Jones indices, are mathematically some kind of measure of overall market

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k-mean clustering + heatmap

October 10, 2011
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If you want more info about clustering, I have another post about "Clustering analysis and its implementation in R". Here is the link:  http://onetipperday.blogspot.com/2012/04/clustering-analysis-2.html------------Several R functions in this...

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Heatmap tables done better, in Sweave and latex

July 10, 2011
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Heatmap tables done better, in Sweave and latex

  I wrote before about using heatmap tables to combine the strengths of tables and graphics for nominal data. Here is a neat approach using Sweave and latex to produce an effect like in the picture. This latex code is self-contain...

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Heatmap tables done better, in Sweave and latex

July 10, 2011
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Heatmap tables done better, in Sweave and latex

  I wrote before about using heatmap tables to combine the strengths of tables and graphics for nominal data. Here is a neat approach using Sweave and latex to produce an effect like in the picture. This latex code is self-contained. Just save it as myfile.Rnw, run Sweave(myfile.Rnw) from inside R and then pdflatex myfile.tex

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Drawing heatmaps in R

June 24, 2011
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Drawing heatmaps in R

A while back, while reading chapter 4 of Using R for Introductory Statistics, I fooled around with the mtcars dataset giving mechanical and performance properties of cars from the early 70's. Let's plot this data as a hierarchically clustered heatmap. # scale data to mean=0, sd=1 and convert to matrix mtscaled <- as.matrix(scale(mtcars)) # create...

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ggheat : a ggplot2 style heatmap function

March 11, 2011
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ggheat  :  a ggplot2 style heatmap function

I hope the code here is fairly self-explanatory with the inset annotations. I feel this is just a bit 'prettier' than heatmap.2 and has for me the right balance of options and extensibility. I have also found it difficult to produce high quality plots...

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Heatmap tables

January 7, 2011
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Heatmap tables

I blogged earlier (http://socialdatablog.com/what-is-wrong-with-this-graph) about the well-known risks of implying a continuous data scale in a graph where there isn't one. I just produced this alternative in the form of a heatmap table...

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Heatmap tables

January 7, 2011
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Heatmap tables

I blogged earlier (http://socialdatablog.com/what-is-wrong-with-this-graph) about the well-known risks of implying a continuous data scale in a graph where there isn't one. I just produced this alternative in the form of a heatmap table, i.e. a heatmap in which the numbers themselves are also shown. Perhaps not quite as intuitive but less misleading. It uses the

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Animated Heatmap of WikiLeaks Report Intensity in Afghanistan

August 17, 2010
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Visualisation of Activity in Afghanistan using the Wikileaks data from Mike Dewar on Vimeo. The latest visualization of the WikiLeaks data compiled by our group is an animation of the intensity of report observations in Afghanistan over the six year period in the WikiLeaks data. Team member Mike Dewar did the vast majority of work for

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R: heatmaps with gplots

April 8, 2010
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R: heatmaps with gplots

I use heatmaps quite a lot for visualizing data, microarrays of course but also DNA motif enrichment, base composition and other things. I particular like the heatmap.2 function of the gplots package. It has a couple of defaults that are a little ugly ...

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