all
Are All Values True?
Given a set of logical vectors, are all of the values true?
 Keywords
 logic
Usage
all(..., na.rm = FALSE)
Arguments
 ...
 zero or more logical vectors. Other objects of zero length are ignored, and the rest are coerced to logical ignoring any class.
 na.rm
 logical. If true
NA
values are removed before the result is computed.
Details
This is a generic function: methods can be defined for it
directly or via the Summary
group generic.
For this to work properly, the arguments ...
should be
unnamed, and dispatch is on the first argument.
Coercion of types other than integer (raw, double, complex, character, list) gives a warning as this is often unintentional.
This is a primitive function.
Value

The value is a logical vector of length one.Let x denote the concatenation of all the logical vectors in
... (after coercion), after removing NAs if requested by
na.rm = TRUE.The value returned is TRUE if all of the values in x are
TRUE (including if there are no values), and FALSE if at
least one of the values in x is FALSE. Otherwise the
value is NA (which can only occur if na.rm = FALSE and
... contains no FALSE values and at least one
NA value).
Note
That all(logical(0))
is true is a useful convention:
it ensures that
all(all(x), all(y)) == all(x, y)even if
x
has length zero.
S4 methods
This is part of the S4 Summary
group generic. Methods for it must use the signature
x, ..., na.rm
.
References
Becker, R. A., Chambers, J. M. and Wilks, A. R. (1988) The New S Language. Wadsworth & Brooks/Cole.
See Also
any
, the ‘complement’ of all
, and
stopifnot(*)
which is an all(*)
‘insurance’.
Examples
library(base)
range(x < sort(round(stats::rnorm(10)  1.2, 1)))
if(all(x < 0)) cat("all x values are negative\n")
all(logical(0)) # true, as all zero of the elements are true.
Community examples
Pass a vector to `all()`, and it will return `TRUE` if all the elements are `TRUE`. ```{r} all(1:5 > 0) all(2:2 > 0) ``` Pass several numbers to `all()`, and it will return `TRUE` if all the arguments are `TRUE`. ```{r} all(TRUE, 99 > 66, 64 %% 8 == 0) all(TRUE, 99 < 66, 64 %% 8 == 0) ``` In fact, you can pass vectors into several arguments, and everything gets combined together before checking if all the values are `TRUE`. ```{r} all( 1:5 > 0, rep.int(TRUE, 5), 99 > 66, seq.int(8, 64, 8) %% 8 == 0 ) ``` If there are any missing values, then `all()` returns `NA`. ```{r} all(1:5 > 0, NA) ``` You can exclude missing values by setting `na.rm = TRUE`. ```{r} all(1:5 > 0, NA, na.rm = TRUE) ```