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spss中使用syntax操作missing值

2008-09-02 10:32:44| 分类： spss学习 | 标签： |举报 |字号大中小订阅

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spss中使用syntax操作missing值

PROBLEM:

incorrect

IF (OLDVAR = 9) NEWVAR=. .

SPSS

incorrect

IF (OLDVAR = .) NEWVAR = 4.

SOLUTION:

Numeric Variables

To create a new numeric missing value, use "$sysmis" after the equal sign, as in this example:

IF (OLDVAR = 9) NEWVAR = $SYSMIS.

IF MISSING(OLDVAR) NEWVAR = 4.

Character (String/Alphanumeric) Variables

Missing values in string variables are handled in a more straightforward manner.

To create a new string missing value, use quotation marks (' ', or " ") after the equal sign, as in this example:

IF (OLDVAR = 'X') NEWVAR = " ".

To use a string missing value in an evaluation expression, use quotes similar to the above, as in this example:

IF (OLDVAR=' ') NEWVAR = "XYZ".

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