Electronic Statistics Textbook
The StatSoft electronic statistics textbook includes hundreds of illustrations and offers quick, easy and free unlimited access to training in and application of statistics. The material is developed at the StatSoft R&D department and covers a wide variety of applications such as laboratory research (biomedical, agricultural, etc.), business statistics and forecasting, social science statistics and survey research, data mining, engineering, quality control applications, etc.
Data Reduction (More...)
Data Rotation (in 3D space)
Degrees of Freedom
Derivative-free Function Minimization Algorithms