Using colorized PNG pictograms in R base plots

Awesome.

"R" you ready?

Today I stumbled across a figure in an explanation on multiple factor analysis which contained pictograms.

abdi_mfa

Figure 1 from Abdi & Valentin (2007), p. 8.

I wanted to reproduce a similar figure in R using pictograms and additionally color them e.g. by group membership . I have almost no knowledge about image processing, so I tried out several methods of how to achieve what I want. The first thing I did was read in an PNG file and look at the data structure. The package png allows to read in PNG files. Note that all of the below may not work on Windows machines, as it does not support semi-transparency (see ?readPNG).

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Posted on September 12, 2014, in Uncategorized. Bookmark the permalink. Leave a comment.

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