[R] lapply and runif issue?

Bert Gunter bgunter.4567 at gmail.com
Wed Nov 15 02:11:39 CET 2017


Could someone please explain the following? I did check bug reports, but
did not recognize the issue there. I am reluctant to call it a bug, as it
is much more likely my misunderstanding. Ergo my request for clarification:

## As expected:

> lapply(1:3, rnorm, n = 3)
[[1]]
[1] 2.481575 1.998182 1.312786

[[2]]
[1] 2.858383 1.827863 1.699015

[[3]]
[1] 1.821910 2.530091 3.995677


## Unexpected by me:

> lapply(1:3, runif, n = 3)
[[1]]
[1] 1 1 1

[[2]]
[1] NaN NaN NaN

[[3]]
[1] NaN NaN NaN

Warning messages:
1: In FUN(X[[i]], ...) : NAs produced
2: In FUN(X[[i]], ...) : NAs produced


## But note, as expected:

> lapply(1:3, function(x)runif(3))
[[1]]
[1] 0.2950459 0.8490556 0.4303680

[[2]]
[1] 0.5961144 0.5330914 0.2363679

[[3]]
[1] 0.8079495 0.1431838 0.3671915



Many thanks for any clarification.

-- Bert

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