is_freq is a function that checks whether its single argument freq
is a frequency (i.e., a positive numeric integer value).
is_freq(freq)A single (typically numeric) argument.
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_integer(),
is_matrix(),
is_perc(),
is_prob(),
is_suff_prob_set(),
is_valid_prob_pair(),
is_valid_prob_set(),
is_valid_prob_triple()
# ways to succeed:
is_freq(2) # => TRUE, but does NOT return the frequency 2.
#> [1] TRUE
is_freq(0:3) # => TRUE (for vector)
#> [1] TRUE
## 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:
# is.integer(2) # => FALSE!