riskyr (version 0.1.0)

dec.cor: Number of individuals for which the decision is correct.

Description

dec.cor is a frequency that describes the number of individuals in the current population N for which the decision is correct (i.e., cases in which the decision corresponds to the condition).

Usage

dec.cor

Format

An object of class numeric of length 1.

Details

Key relationships:

1. to probabilities: The frequency of dec.cor individuals depends on the population size N and is equal to the sum of true positives hi and true negatives cr.

2. 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)

   • dec.cor = hi + cr

   • dec.err = mi + fa

   • N = hi + mi + fa + cr (by condition x decision)

Current frequency information is computed by comp_freq and contained in a list freq.

References

Consult Wikipedia: Confusion matrix for additional information.

See Also

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.err, dec.neg, dec.pos, fa, hi, mi

Examples

# NOT RUN {
dec.cor <- 1000 * .50   # => sets dec.cor to 50% of 1000 = 500 cases.
is_freq(dec.cor)        # => TRUE
is_prob(dec.cor)        # => FALSE, as dec.cor is no probability (but acc, bacc/wacc ARE)
# }