How to collapse a logical vector with AND or OR?

Question

How can I apply the AND & or OR| operators to a logical vector in R?

For example:

a <- c(FALSE,FALSE,FALSE,FALSE,TRUE,FALSE,FALSE,FALSE)

Is there a simple way to

• Are all elements TRUE? Like putting an & between each element:
  • when applied to the above vector it would return: FALSE
• Are any elements TRUE? Like putting a | between each element
  • when applied to the above vector it would return: TRUE

Answer 1

allTrue <- all(a)
anyTrue <- any(a)

The documentation for these functions is linked from help("&") or help("|").

Answer 2

all and any are exactly what you are after, alternatively:

sum(a)==length(a) # Are all elements TRUE?

sum(a)>0 # Are any elements TRUE?