chemical.hlp:

The file  chemical.mat  is used in ``Learning  glmlab:  Using  matlab  for
generalised linear models''  in Section 3.2: Multiple Regression.

The file contains the following variables:

Cat:    The weight of catalyst (in kg)
Method: The method used to produce the chemical (qualitative)
Temp:   The temperature of the manufacturing process
Vol:    The volume of toxic by-product produced.

The data is artificial.
