# comp_fart

##### Compute a decision's false alarm rate from its specificity.

`comp_fart`

is a conversion function that takes a specificity `spec`

-- given as a probability (i.e., a numeric value in the range from 0 to 1) --
as its input, and returns the corresponding false alarm rate `fart`

-- also as a probability -- as its output.

##### Usage

`comp_fart(spec)`

##### Arguments

- spec
The decision's specificity value

`spec`

as a probability.

##### Details

The false alarm rate `fart`

and specificity `spec`

are complements (`fart = (1 - spec)`

) and both features of
the decision process (e.g., a diagnostic test).

The function `comp_fart`

is complementary to the conversion function
`comp_spec`

and uses the generic function
`comp_complement`

.

##### Value

The decision's false alarm rate `fart`

as a probability.

##### See Also

`comp_complement`

computes a probability's complement;
`is_complement`

verifies probability complements;
`comp_prob`

computes current probability information;
`prob`

contains current probability information;
`is_prob`

verifies probabilities.

Other functions computing probabilities: `comp_FDR`

,
`comp_FOR`

, `comp_NPV`

,
`comp_PPV`

, `comp_accu_freq`

,
`comp_accu_prob`

, `comp_acc`

,
`comp_comp_pair`

,
`comp_complement`

,
`comp_complete_prob_set`

,
`comp_err`

, `comp_mirt`

,
`comp_ppod`

, `comp_prob_freq`

,
`comp_prob`

, `comp_sens`

,
`comp_spec`

##### Examples

```
# NOT RUN {
comp_fart(2) # => NA + warning (beyond range)
comp_fart(1/3) # => 0.6666667
comp_fart(comp_complement(0.123)) # => 0.123
# }
```

*Documentation reproduced from package riskyr, version 0.2.0, License: GPL-2 | GPL-3*