DesignMatrix

• To use DesignMatrix, you first need to load the Linear Regression Package using Needs["LinearRegression`"].

• The i row of a design matrix contains the values of the basis functions funs evaluated at the values for the i element in data.

• The data can have the form {{x₁, y₁, ..., f₁}, {x₂, y₂, ..., f₂}, ...}, where the number of coordinates x, y, ... is equal to the number of variables in the list vars.

• The data can also be of the form {f₁, f₂, ...}, with a single coordinate assumed to take values 1, 2, ....

• The argument funs can be any list of functions that depend only on the variables vars.

• The following option can be given:

• With the default setting IncludeConstant->True, the constant 1 is included as the first entry in the list of basis functions if a constant is not included in funs.