is.allzero {dae} R Documentation

## Tests whether all elements are approximately zero

### Description

A single-line function that tests whether all elements are zero (approximately).

### Usage

is.allzero(x)

### Arguments

 x An object whose elements are to be tested.

### Details

The mean of the absolute values of the elements of x is tested to determine if it is less than daeTolerance, which is initially set to .Machine\$double.eps ^ 0.5 (about 1.5E-08). The function set.daeTolerance can be used to change daeTolerance.

### Value

A logical.

Chris Brien

### Examples

## create a vector of 9 zeroes and a one
y <- c(rep(0,9), 1)

## check that vector is only zeroes is FALSE
is.allzero(y)


[Package dae version 3.2-13 Index]