# Quality Graphics With R

2016-08-09

Note the use of an attractive colour pallette, style-compatible fonts, and even the official Olympic icons for the sports. I just took a screenshot here, but if you click through to the actual site you’ll notice that these graphics are also scale-independent (you can zoom in on your browser and they’ll look better, not worse) and even interactive (pop-ups appear with country-specific data when you hover over a bar).

Duc-Quang has been generous enough to provide the R code behind these charts if you’d like to try your hand at something similar. The data themselves were scraped from the official Rio 2016 site. The bar charts were created using a standard geom_bar plot using ggplot2, with a custom theme to set the font to OpenSans Condensed. The interactive elements were added using the ggiraph package and the geom_bar_interactive function. The chart titles (including the icons) were created as HTML headers directly, which was then exported along with the interactive charts using the save_html function.

I’m impressed that this all comes from R.  There’s a good bit of work involved in getting this going, but you can get professional-grade graphics quality with R, and that’s pretty cool.

## The Intuition Behind Principal Component Analysis

2018-12-07

Holger von Jouanne-Diedrich gives us an intuition behind how principal component analysis (PCA) works: Principal component analysis (PCA) is a dimension-reduction method that can be used to reduce a large set of (often correlated) variables into a smaller set of (uncorrelated) variables, called principal components, which still contain most of the information.PCA is a concept […]

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## Plotting Diagrams In R With nest() And map()

2018-12-06

Sebastian Sauer shows how to display multiple ggplot2 diagrams together using facets as well as a combination of the nest() and map() functions: One simple way is to plot several facets according to the grouping variable: d %>% ggplot() + aes(x = hp, y = mpg) + geom_point() + facet_wrap(~ cyl) Faceting is great, but it’s good to know […]

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August 2016
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