base (version 3.5.1)

# all: Are All Values True?

## Description

Given a set of logical vectors, are all of the values true?

## 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.

## 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 `NA`s 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).

## S4 methods

This is part of the S4 `Summary` group generic. Methods for it must use the signature `x, …, na.rm`.

## 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.

## References

Becker, R. A., Chambers, J. M. and Wilks, A. R. (1988) The New S Language. Wadsworth & Brooks/Cole.

`any`, the ‘complement’ of `all`, and `stopifnot(*)` which is an `all(*)` ‘insurance’.

## Examples

Run this code
``````# NOT RUN {
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.
# }
``````

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