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Representation of information in a formalised manner suitable for communication, interpretation, or processing by humans or by automatic means.

semanticity

Logistic regression:

11+e(xμ)/s\frac{1}{1 + e^{-(x - \mu)/s}}
  • schema + relational.

theory

See also database

types.

nominal data

  • qualitative data
  • mutually exclusive
  • cannot be ranked
  • == \neq \in \notin

ordinal data

  • represents categories
  • =><= \neq \in \notin > <

time-series data (interval)

  • no true zero
  • =><+= \neq > < + -

ratio data

  • =><+×%= \neq > < + - \times \%

dimensionality