Application Guide

Logistic
Catalog >
Category is a list of category codes for the
corresponding X and Y data.
Include is a list of one or more of the
category codes. Only those data items
whose category code is included in this list
are included in the calculation.
For information on the effect of empty
elements in a list, see “Empty (Void)
Elements,” page 236.
Output
variable
Description
stat.RegEqn
Regression equation: c/(1+a•e
-bx
)
stat.a,
stat.b, stat.c
Regression coefficients
stat.Resid Residuals from the regression
stat.XReg
List of data points inthe modified X List actually usedin the regression based on
restrictions of Freq, Category List, and Include Categories
stat.YReg
List of data points inthe modified Y List actually used in the regression based on
restrictions of Freq, Category List, and Include Categories
stat.FreqReg
List of frequencies corresponding to stat.XReg andstat.YReg
LogisticD
Catalog >
LogisticD X, Y [, [Iterations] , [Freq] [,
Category, Include] ]
Computes the logistic regression y = (c/
(1+a•e
-bx
)+d) on lists X and Y with frequency
Freq, using a specified number of
Iterations. A summary of results is stored in
the stat.results variable. (See page 177.)
All the lists must have equal dimension
except for Include.
X and Y are lists of independent and
dependent variables.
Alphabetical Listing 109