Description Usage Format Details References See Also Examples
dec.neg
is a frequency that describes the
number of individuals in the current population N
for which the decision is negative (i.e., cases not called or not predicted).
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An object of class numeric
of length 1.
Key relationships:
to probabilities:
The frequency of dec.neg
individuals depends on the population size N
and
the decision's proportion of negative decisions (1 - ppod)
and is split further into two subsets of
cr
by the negative predictive value NPV
and
mi
by the false omission rate FOR = 1 - NPV
.
Perspectives:
by condition:
The frequency dec.neg
is determined by the population size N
times
the proportion of negative decisions (1 - ppod)
:
dec.neg = N x (1 - ppod)
by decision:
a. The frequency cr
is determined by dec.neg
times the negative predictive value NPV
:
cr = dec.neg x NPV
b. The frequency mi
is determined by dec.neg
times the false omission rate FOR = (1 - NPV)
:
mi = dec.neg x FOR = dec.neg x (1 - NPV)
to other frequencies:
In a population of size N
the following relationships hold:
N = cond.true + cond.false
(by condition)
N = dec.pos + dec.neg
(by decision)
N = dec.cor + dec.err
(by correspondence of decision to condition)
N = hi + mi + fa + cr
(by condition x decision)
Current frequency information is computed by
comp_freq
and contained in a list
freq
.
Consult Wikipedia: Confusion matrix for additional information.
is_freq
verifies frequencies;
num
contains basic numeric parameters;
init_num
initializes basic numeric parameters;
freq
contains current frequency information;
comp_freq
computes current frequency information;
prob
contains current probability information;
comp_prob
computes current probability information.
Other frequencies: N
,
cond.false
, cond.true
,
cr
, dec.cor
,
dec.err
, dec.pos
,
fa
, hi
, mi
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