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Linear versus non-linear transformations
Linear transformation
- F(x) of a raw data vector x such that F is a linear function of x. E.g. F(x)=2x+1
Non-linear transformations
- F(x) of a raw data vector x such that F is a non-linear function of x. E.g. F(x)=1(1+e-x.c)
Other non-linear transformations
- The logarithmic function, F(x)=log10x.