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PLS使用手册(英文)
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PLS - Graph User’s
Guide
Version 3.0
Wynne W. Chin
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PLS-Graph User’s Guide, Version 3.0, February, 2001 edition Wynne W. Chin (author)
Copyright Notice
©1993–2001. Soft Modeling Inc. All rights reserved worldwide. No part of this publication may be
reproduced, transmitted, transcribed, stored in a retrieval system, or translated into any language or
computer language, in any form or any means, electronic, mechanical, magnetic, optical, chemical,
manual or otherwise without the express written permission of Soft Modeling Inc.
SOFT MODELING SOFTWARE LICENSE AGREEMENT
The following constitutes the terms of the License Agreement between a single user (User) of this software
package, and the producer of the package, Soft Modeling, Inc. (called Soft Modeling hereafter). By
opening the package, you (the User) are agreeing to become bound by the terms of this agreement.
If you do not agree to the terms of this agreement do not open the package, and contact the Soft Modeling
Customer Service Department at a local Soft Modeling office (or an authorized Soft Modeling reseller) in
order to obtain an authorization number for the return of the package. This License Agreement pertains
also to all third party software included in or distributed with Soft Modeling products.
License
Unless explicitly stated on the program media (CD or disks), the enclosed software package are sold to be
used on one computer system by one user at a time. This License Agreement explicitly excludes renting
or loaning the package. Unless explicitly stated on the program media, this License Agreement explicitly
excludes the use of this package on multi-user systems, networks, or any time-sharing systems.
(Contact Soft Modeling concerning Multi-user License Programs.) The user is allowed to install the
software package on a hard disk and make a backup copy for archival purposes. However, the software
will never be installed on more than one hard disk at a time. The documentation accompanying this
software package (or any of its parts) shall not be copied or reproduced in any form.
Disclaimer of Warranty
Although producing error free software is obviously a goal of every software manufacturer, it can never be
guaranteed that a software program is actually free of errors. Business and scientific application software
is inherently complex (and it can be used with virtually unlimited numbers of data and command settings,
producing idiosyncratic operational environments for the software); therefore, the User is cautioned to
verify the results of his or her work. This software package is provided "as is" without warranty of any
kind. Soft Modeling and distributors of Soft Modeling software products make no representation or
warranties with respect to the contents of this software package and specifically disclaim any implied
warranties or merchantability or fitness for any particular purpose.
In no event shall Soft Modeling be liable for any damages whatsoever arising out of the use of, inability to
use, or malfunctioning of this software package. Soft Modeling does not warrant that this software
package will meet the User's requirements or that the operation of the software package will be
uninterrupted or error free.
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Limited Warranty
If within 30 days from the date when the software package was purchased (i.e., invoice date), the program
media (CD or disks) are found to be defective (i.e., they are found to be unreadable by the properly aligned
media drive of the computer system on which the package is intended to run), Soft Modeling will replace
the media free of charge. After 30 days, the User will be charged for the replacement a nominal disk
replacement fee.
If within 30 days from the date when the software package was purchased (i.e., invoice date), the software
package was found by the User not capable of performing any of its main (i.e., basic) functions described
explicitly in promotional materials published by Soft Modeling, Soft Modeling will provide the User with
replacement media free of defects (or a replacement component downloadable from the Soft Modeling
WEB site),
or if the replacement cannot be provided within 90 days from the date when Soft Modeling was notified by
the User about the defect, the User will receive a refund of the purchasing price of the software package.
Updates, Corrections, Improvements
The User has a right to purchase all subsequent updates, new releases, new versions, and modifications of
the software package introduced by Soft Modeling for an update fee or for a reduced price (depending on
the scope of the modification); however, purchasing an update or upgrade (for a reduced price) constitutes
a replacement of an existing license and not acquisition of a new license.
Soft Modeling is not obligated to inform the User about new updates, improvements, modifications, and/or
corrections of errors introduced to its software packages. In no event shall Soft Modeling be liable for any
damages whatsoever arising out of the failure to notify the User about a known defect of the software
package.
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PREFACE
PLS-Graph represents an attempt to make latent variable path modeling using the Partial Least
Squares (PLS) approach accessible and convenient to all interested parties. The utility of the PLS method
has been documented elsewhere (Chin, 1998; Chin & Newsted, 1999; Falk and Miller, 1992) as possibly
more appropriate for a large percentage of the studies and data sets typically used among researchers. As
opposed to covariance-based approaches (exemplified by software such as LISREL or EQS), PLS places
much less restrictions on matters such as sample size and data distributions. While the most widely
available program developed by Lohmoller (1984) has a great deal of functionality and is available at
reasonable cost, its ease of use can be extremely daunting to the initial user.
In order to increase the usablility and accessibility of the PLS approach, PLS-Graph was developed
as a self contained Graphical User Interface (GUI) based software which creates input decks compatible
with the existing PLSX program developed by Lohmoller. PLS-Graph allows the user to focus more on
the appropriateness of the model and data set rather than on how to get the program to run. Our
experiences have shown that using PLS-Graph has decreased the time to complete a PLS analysis over
ten-fold compared to other existing programs.
We hope that you agree.
Wynne Chin & Tim Frye (developers)
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PLS-Graph User Manual
Introduction
PLS-Graph is a Windows based graphical user interface that assists in performing PLS analyses. The
program assists in generating PLSX (version 1.8) compatible command files. PLS-Graph can then be
used to process the command file to create an output file containing the results of the analysis as specified
by the command file. PLS-Graph allows you to view the results file in a scrollable window or
alternatively extract some of the results back into the same graph used to generate the PLSX command
file. By using a consistent two button mouse metaphor, the user can quickly depict a theoretical model in
a graphical representation consistent with the Partial Least Squares method of structural equations
modeling with latent variable (i.e., relationships among latent variables and their respective indicators),
process the model, and display the results all within a graphical user environment.
Installation.
(This procedure need only be performed once)
1. Double click the file Plsgraph.exe The entire installation occupies approximately 1 Meg.
2. The default directory of c:\Program Files\plsgraph will present itself. While you can specify a new
directory, we recommend that you use the default in order to be consistent with the example files which
expect the data files to reside in this directory.
3. The result should be a new icon in your new PLS-Graph group window.
4. Licensed users need to copy the “license.dat” file into the plsgraph directory.
Test Run
1. Start-up the PLS-Graph program by either clicking on the icon, running from the program menu, or
clicking on the plsgraph.exe file in the plsgraph directory. The result is shown in Figure 1.
2. Move you cursor to the Top left menu item labeled File – click and select Open (see Figures 2 and 3).
3. Move the floating Menu titled “PLS Graph Tools” (by clicking the label and dragging the menu) to
uncover the floating Menu titled “PLS Functions” (see Figure 5).
4. Click the far left icon in the “PLS Functions” menu with the three squares to run the model and extract
the results back into the graph (see Figure 6). If the software is working, you should obtain results as
depicted in Figure 7.
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