is_perc is a function that checks whether its single argument perc
is a percentage (proportion, i.e., a numeric value in the range from 0 to 100).
is_perc(perc)A single (typically numeric) argument.
A Boolean value:
TRUE if perc is a percentage (proportion),
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_freq(),
is_integer(),
is_matrix(),
is_prob(),
is_suff_prob_set(),
is_valid_prob_pair(),
is_valid_prob_set(),
is_valid_prob_triple()
# ways to succeed:
is_perc(2) # => TRUE, but does NOT return the percentage 2.
#> [1] TRUE
is_perc(1/2) # => TRUE, but does NOT return the percentage 0.5.
#> [1] TRUE
## note:
# pc_sq <- seq(0, 100, by = 10)
# is_perc(pc_sq) # => TRUE (for vector)
## ways to fail:
# is_perc(NA) # => FALSE + warning (NA values)
# is_perc(NaN) # => FALSE + warning (NaN values)
# is_perc("Bernoulli") # => FALSE + warning (non-numeric values)
# is_perc(101) # => FALSE + warning (beyond range)