# is_freq: Verify that input is a frequency (positive integer value). In riskyr: Rendering Risk Literacy more Transparent

## Description

`is_freq` is a function that checks whether its single argument `freq` is a frequency (i.e., a positive numeric integer value).

## Usage

 `1` ```is_freq(freq) ```

## Arguments

 `freq` A single (typically numeric) argument.

## Value

A Boolean value: `TRUE` if `freq` is a frequency (positive integer), otherwise `FALSE`.

`num` contains basic numeric variables; `init_num` initializes basic numeric variables; `prob` contains current probability information; `comp_prob` computes current probability information; `freq` contains current frequency information; `comp_freq` computes current frequency information; `is_valid_prob_set` verifies the validity of probability inputs; `as_pc` displays a probability as a percentage; `as_pb` displays a percentage as probability
Other verification functions: `is_complement`, `is_extreme_prob_set`, `is_perc`, `is_prob`, `is_suff_prob_set`, `is_valid_prob_pair`, `is_valid_prob_set`, `is_valid_prob_triple`
 ``` 1 2 3 4 5 6 7 8 9 10 11``` ```# ways to succeed: is_freq(2) # => TRUE, but does NOT return the frequency 2. is_freq(1:3) # => TRUE (for vector) # ways to fail: is_freq(-1) # => FALSE + warning (negative values) is_freq(1:-1) # => FALSE (for vector) + warning (negative values) is_freq(c(1, 1.5, 2)) # => FALSE (for vector) + warning (non-integer values) ## Note that: is.integer(2) # => FALSE! ```