219 search results for "heatmap"

How to correctly set color in the image() function?

May 15, 2015
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Sometimes we want to make our own heatmap using image() function. I recently found it's tricky to set the color option there, as its manual has very little information on col:cola list of colors such as that generated by rainbow, heat.colors,...

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Playing with elastichoney data in R

May 11, 2015
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Playing with elastichoney data in R

Work has kept myself & @jayjacobs quite busy of late, but a small data set posted by @jw_sec this morning made for an opportunity for a quick blog post to show how to do some data maniupation and visualization in R for both security and non-security folk (hey, this may even get more non-security folk looking at security data...

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Digging up embedded plots

May 7, 2015
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Digging up embedded plots

by Joseph Rickert The following multi-panel graph, which graces the cover of the most recent issue of the Journal of Computational and Graphical Statistics ,JCGS, (Vol 24, Num 1, March 2015) is from the paper by Grolemund and Wickham entitled Visualizing Complex Data With Embedded Plots. The four plots are noteworthy for a couple or reasons: They present superb...

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Wakefield: Random Data Set (Part II)

April 29, 2015
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Wakefield: Random Data Set (Part II)

This post is part II of a series detailing the GitHub package, wakefield, for generating random data sets. The First Post (part I) was a test run to gauge user interest. I received positive feedback and some ideas for improvements, … Continue reading →

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Blue period: Analyzing the color of paintings with R

April 24, 2015
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Blue period: Analyzing the color of paintings with R

While movies have been getting more orange with time, painting have been going the other direction. Paintings today are generally more blue than they were a few hundred years ago. The image above shows the color spectrum of almost 100,000 paintings created since 1800. Martin Bellander used R to create the image, by scraping images from the BBC YourPaintings...

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Time Series Graphs & Eleven Stunning Ways You Can Use Them

April 22, 2015
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Time Series Graphs & Eleven Stunning Ways You Can Use Them

Many graphs use a time series, meaning they measure events over time. William Playfair (1759 - 1823) was a Scottish economist and pioneer of this approach. Playfair invented the line graph. The graph below–one of his most famous–depicts ho...

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R for more powerful clustering

April 21, 2015
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R for more powerful clustering

by Vidisha Vachharajani Freelance Statistical Consultant R showcases several useful clustering tools, but the one that seems particularly powerful is the marriage of hierarchical clustering with a visual display of its results in a heatmap. The term “heatmap” is often confusing, making most wonder – which is it? A "colorful visual representation of data in a matrix" or "a...

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Project Tycho, ggplot2 and the shameless stealing of blog ideas

April 14, 2015
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Project Tycho, ggplot2 and the shameless stealing of blog ideas

Last week, Mick Watson posted a terrific article on using R to recreate the visualizations in this WSJ article on the impact of vaccination. Someone beat me to the obvious joke. @BioMickWatson @pathogenomenick Nice quilt plot. — Ed Yong (@edyong209) April 9, 2015 Someone also beat me to the standard response whenever base R graphics

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Analysing Dracula

April 14, 2015
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Analysing Dracula

I recently read Bram Stoker’s Dracula, mostly because I wanted to rewatch the 1990s movie of the same name and see how badly they’d mutilated the story.  [Update 26/04/2015: I rewatched the 1992 movie and while it’s the most faithful version to the book, it has some weird additions and is utterly appalling.  People have been … Continue reading...

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Six Ways You Can Make Beautiful Graphs (Like Your Favorite Journalists)

April 8, 2015
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Six Ways You Can Make Beautiful Graphs (Like Your Favorite Journalists)

This post shows how to make graphs like The Economist, New York Times, Vox, 538, Pew, and Quartz. And you can share–embed your beautiful, interactive graphs in apps, blog posts, and web sites. Read on to learn how. If you like interactive graphs and need to securely collaborate with your team, contact us about Plotly Enterprise.

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