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VOL3823
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1992-01-07
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P r o g r a m m a T h e e k volume 3823
gelijk aan PC/SIG no. 823
Titel: Matrix & Regressie-berekeningen
Number Name Size Date Comments
CATALOG 823 1024 5-18-89 This file
3823.01 GO BAT 38 7-08-87 Instructions how to get started
3823.02 GO TXT 771 9-16-87 How to print *.DOC files
3823.03 HALD DAT 256 1-05-87 Hald datafile - stepwise regression
3823.04 HALD MTW 8448 1-02-87 Hald data as saved matrix worksheet
3823.05 LONGLEY DAT 768 1-05-87 Longley data - stepwise regression
3823.06 MATRIX DOC 30976 1-05-87 Doc for interactive calculator
3823.07 MATRIX EXE 58112 1-05-87 Compiled version of ^
3823.08 READ ME 2260 1-09-87 Introduction file
3823.09 STEPREG DOC 22016 1-05-87 Documentation for STEPREG.EXE
3823.10 STEPREG EXE 45824 1-02-87 Stepwise interactive regression
VOL3823 ABS 2048 5-18-89 VOL3823 abstract
3823.11 WAMPLER DAT 768 1-05-87 Wampler data - stepwise regression
13 File(s) 183296 bytes free on VOL3823
Program Title: INTERACTIVE MATRIX CALCULATOR, INTERACTIVE
REGRESSION ver 2
MATRIX CALCULATOR operates on 20 matrix areas, numbered from
1 through 20. Each matrix may store 150 elements, the product of
the number of rows with the number of columns. Since the matrices
are stored in contiguous blocks, if only every other matrix, say
numbers 1,3,5, etc., are used, then up to 300 elements per matrix
may be stored. Storage of 450 elements per matrix is possible if
only areas 1,4,7, etc. are used, 600 elements if only 1,5, etc.
are used, and so on. Since the program makes no boundary checks,
the 151st element of a matrix will be placed into the first
position of the next matrix. Only one operation at a time is
performed; i.e., only one multiplication, one addition, etc.
Results may be displayed at any time using the Print command. The
storage limit of 20 matrices may be extended by using the disk
for additional storage and retrieval.
The idea of INTERACTIVE REGRESSION is that the researcher
knows his data best. Rather than provide canned variable
selection routines, the researcher is prompted for the next step
each time the model changes due to the addition or deletion of a
variable. At any particular step, variables that are in the
equation may be deleted, or variables which are not in the
equation may be added. No provision is made for residual analysis
since no data is stored. This is a serious limitation of the
program in terms of modern regression analysis procedures. The
program is invoked by giving the command STEPREG and then reading
the opening screen which follows. An annotated example of the
interactive analysis of the Hald data is then presented.
Explanatory notes are set apart by "******" borders.
Usage: Statistical Analysis
System Requirements: 128K of memory and one floppy drive.