Stupid R tricks: using outer to create many data.frame subsets

February 11, 2012
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(This article was first published on Jesse S.A. Bridgewater » rstats, and kindly contributed to R-bloggers)

Selecting subsets of a data.frame is easy in R if you define the predicates manually. But if you need to define many conditions the standard slicing and subsetting methods are cumbersome. For this illustration I want to pick some large number of numerical ranges and label all of the rows that match any of the [...]

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