Building Flow Charts In R

Alan Haynes shows how to build flow charts in R using the grid Gmisc packages:

Flow charts are an important part of a clinical trial report. Making them can be a pain though. One good way to do it seems to be with the grid and Gmisc packages in R. X and Y coordinates can be designated based on the center of the boxes in normalized device coordinates (proportions of the device space – 0.5 is this middle) which saves a lot of messing around with corners of boxes and arrows.

A very basic flow chart, based very roughly on the CONSORT version, can be generated as follows…

Click through for sample code and a resulting image.  H/T R-bloggers

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