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Consultants’ Chart in ggplot2

August 16, 2010

Excel Charts Blog posted a video tutorial of how to create a circumplex or rose or dougnut chart in Excel. Apparently this type of chart is very popular in the consulting industry, hence the “Consultants’ Chart”.

consulting.gif

It is very easy to make this chart in Excel 2010, but it involves countless number of clicks and formulas to format both the source data and the chart itself.

In ggplot2 the same can be achieved with around 10 lines of code, as can be seen below.

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ggplot2: Waterfall Charts

May 10, 2010

Waterfall charts are often used for analytical purposes in the business setting to show the effect of sequentially introduced negative and/or positive values. Sometimes waterfall charts are also referred to as cascade charts.

In the next few paragraphs I will show how to plot a waterfall chart using ggplot2.

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ggplot2: Changing the Default Order of Legend Labels and Stacking of Data

March 23, 2010

“How to change the order of legend labels” is a question that gets asked relatively often on ggplot2 mailing list. A variation of this question is how to change the order of series in stacked bar/lineplots.

While these two questions seem to be related, in fact they are separate as the legend is controlled by scales, whereas stacking is controlled by the order of values in the data.

Recently I spent some time getting my head around this, and below is a quick recap.

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ggplot2: Plotting Dates, Hours and Minutes

February 25, 2010

Plotting timeseries with dates on x-axis and times on y-axis can be a bit tricky in ggplot2. However, with a little trick this problem can be easily overcome.

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ggplot2: Quick Heatmap Plotting

January 26, 2010

A post on FlowingData blog demonstrated how to quickly make a heatmap below using R base graphics.

This post shows how to achieve a very similar result using ggplot2.

nba_heatmap_revised.png

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ggplot2: Crayola Crayon Colours

January 21, 2010

Statistical Algorithms blog attempted to recreate a graph depicting the growing colour selection of Crayola crayons in ggplot2 (original graph below via FlowingData).

He also asked the following questions: Is there an easier way to do this? How can I make the axes more like the original? What about the white lines between boxes and the gradual change between years? The sort order is also different.

I will present my version in this post, trying to address some of these questions.

crayons_small.png

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New Features in ggplot2 version 0.8.5

January 7, 2010
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Just before Christmas ggplot2 version 0.8.5 was released, closely following the release of version 0.8.4 a week or so earlier. Whilst both versions included included numerous bugfixes (25 in 0.8.4 and 17 in 0.8.5), the latest version also incorporated some new features.

As ggplot2 is all about graphical display, so I went through the list of new features and below is a visual example of each new feature, plotted most often utilising the code examples included in the respective bugtracker issues.

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