mplus8用户手册Chapter15标题、数据、变量和定义命令.pdf_mpluswasunabletostart资源-CSDN文库

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TITLE, DATA, VARIABLE, And DEFINE Commands

563

CHAPTER 15

TITLE, DATA, VARIABLE, AND

DEFINE COMMANDS

In this chapter, the TITLE, DATA, VARIABLE, and DEFINE

commands are discussed. The TITLE command is used to provide a title

for the analysis. The DATA command is used to provide information

about the data set to be analyzed. The VARIABLE command is used to

provide information about the variables in the data set to be analyzed.

The DEFINE command is used to transform existing variables and create

new variables.

THE TITLE COMMAND

The TITLE command is used to provide a title for the analysis.

Following is the general format for the TITLE command:

TITLE:

title for the analysis

The TITLE command is not a required command. Note that commands

can be shortened to four or more letters.

The TITLE command can contain any letters and symbols except the

words used as Mplus commands when they are followed by a colon.

These words are: title, data, variable, define, analysis, model, output,

savedata, montecarlo, and plot. These words can be included in the title

if they are not followed by a colon. Colons can be used in the title as

long as they do not follow words that are used as Mplus commands.

Following is an example of how to specify a title:

TITLE: confirmatory factor analysis of diagnostic criteria

The title is printed in the output just before the Summary of Analysis.

TITLE, DATA, VARIABLE, And DEFINE Commands

567

summary data are analyzed. This option is not required when individual

data are analyzed. Default settings are shown in the last column. If the

default settings are appropriate for the options that are not required,

nothing needs to be specified for these options.

Note that commands and options can be shortened to four or more

letters. Option settings can be referred to by either the complete word or

the part of the word shown above in bold type.

FILE

The FILE option is used to specify the name and location of the ASCII

file that contains the data to be analyzed. The FILE option is required

for each analysis. It is specified for a single group analysis as follows:

FILE IS c:\analysis\data.dat;

where data.dat is the name of the ASCII file containing the data to be

analyzed. In this example, the file data.dat is located in the directory

c:\analysis. If the full path name of the data set contains any blanks, the

full path name must have quotes around it.

If the name of the data set is specified with a path, the directory

specified by the path is checked. If the name of the data set is specified

without a path, the local directory is checked. If the data set is not found

in the local directory, the directory where the input file is located is

checked.

FORMAT

The FORMAT option is used to describe the format of the data set to be

analyzed. Individual data can be in fixed or free format. Free format is

the default. Fixed format is recommended for large data sets because it

is faster to read data using a fixed format. Summary data must be in free

format.

For data in free format, each entry on a record must be delimited by a

comma, space, or tab. When data are in free format, the use of blanks is

not allowed. The number of variables in the data set is determined from

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