[Rd] iterated lapply

Daniel Kaschek daniel.kaschek at physik.uni-freiburg.de
Mon Feb 23 21:57:49 CET 2015

Hi everybody,

with the following code I generate a list of functions. Each function
reflects a "condition". When I evaluate this list of functions by
another lapply/sapply, I get an unexpected result: all values coincide.
However, when I uncomment the print(), it works as expected. Is this a
bug or a feature?

conditions <- 1:4
test <- lapply(conditions, function(mycondition){
  myfn <- function(i) mycondition*i

sapply(test, function(myfn) myfn(2))


Daniel Kaschek
Institute of Physics
Freiburg University

Room 210
Phone: +49 761 2038531

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