In a way, R to statistics is something like Matlab to signal processing: It is an excellent environment for developing the methodology, but not always perfect for software distribution. For instance, it is not certain how much of LSST pipeline can be based on R code.

While R is originally designed just for development and testing of statistical methods, many use it also for software distribution, rather than using a programming language that is more suitable for developing software for distribution (e.g., C++). Therefore, while promoting R in astroinformatics surely has value, it should be done with care so that the methods can be of actual use also to audience of astronomers outside the astrostatistics community.
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