dec.neg is a frequency that describes the
number of individuals in the current population
for which the decision is negative (i.e., cases not called or not predicted).
An object of class
numeric of length 1.
The frequency of
dec.neg individuals depends on the population size
the decision's proportion of negative decisions
(1 - ppod) and is split further into two subsets of
cr by the negative predictive value
mi by the false omission rate
FOR = 1 - NPV.
dec.neg is determined by the population size
the proportion of negative decisions
(1 - ppod):
dec.neg = N x (1 - ppod)
a. The frequency
cr is determined by
dec.neg times the negative predictive value
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
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.
1 2 3
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.