SAP HANA R Integration Guide

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Input to R only required data.
Predefine right-sized data structures and fill them, rather than appending new elements (which involves
more expensive copy operations).
Vectorize calculations, avoid iterations.
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Use apply() and the plyr package instead of loops.
○ See http://nsaunders.wordpress.com/2010/08/20/a-brief-introduction-to-apply-in-r .
○ See http://www.r-project.org/doc/Rnews/Rnews_2008-1.pdf .
Avoid unnecessary character creation operations, for example:
USE.NAMES=FALSE in sapply, use.names=FALSE in unlist
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Use appropriate functions, often from specialized packages.
Identify appropriate algorithms, for example, the intrinsic %in% operation is O(N), whereas coding this
operation in R code might have a cost of O(N 2 ).
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P U B L I C
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SAP HANA R Integration Guide
R and SAP HANA