QuadReg
Catalog >
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 232.
Output
variable
Description
stat.RegEqn
Regression equation: a
•
x
2
+b
•
x+c
stat.a,
stat.b, stat.c
Regression coefficients
stat.R
2
Coefficient of determination
stat.Resid
Residuals from the regression
stat.XReg
List of data points in the modified
X List
actually used in the regression based on
restrictions of
Freq
,
Category List
, and
Include Categories
stat.YReg
List of data points in the 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
and
stat.YReg
QuartReg
Catalog >
QuartReg
X
,
Y
[
,
Freq
][
,
Category
,
Include
]]
Computes the quartic polynomial regression
y = a
•
x
4
+b
•
x
3
+c
•
x
2
+d
•
x+e on lists
X
and
Y
with frequency
Freq
. A summary of results
is stored in the
stat.results
variable. (See
page 172.)
All the lists must have equal dimension
except for
Include
.
X
and
Y
are lists of independent and
dependent variables.
Freq
is an optional list of frequency values.
Each element in
Freq
specifies the
frequency of occurrence for each
corresponding
X
and
Y
data point. The
default value is 1. All elements must be
integers
≥
0.
Alphabetical Listing
139
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