Transformations for pre-processing of data

• Sampling

• The process of selecting a subset of the available data. Can be applied to continuous time series data such as speech and music.

• Discretisation

• Representing continuous-valued data with the use of sub-intervals where the real values lie.

• Normalisation

• Moving the scale of the real data into a predefined scale e.g. [0,1]. Can be linear or non-linear.