Re: Selecting cases using the "IF" Function

[Dr. Oliver Walter]

Hi,

I think that you are unfortunately right. In the Graphical User Interface (GUI) this option is missing. I missed it yesterday and this morning, too. But there seems to be the possibility of "select if" by writing a syntax file. On page 130 of the manual you can read:

"13.4 SELECT IF

SELECT IF _expression_.

SELECT IF selects cases for analysis based on the value of _expression_. Cases not selected
are permanently eliminated from the active dataset, unless TEMPORARY is in effect (see
Section 13.6 [TEMPORARY], page 123).

Specify a boolean _expression_ (see Chapter 7 [Expressions], page 46). If the value of the
_expression_ is true for a particular case, the case will be analyzed. If the _expression_ has a
false or missing value, then the case will be deleted from the data stream.

Place SELECT IF as early in the command file as possible. Cases that are deleted early
can be processed more efficiently in time and space.

When SELECT IF is specified following TEMPORARY (see Section 13.6 [TEMPORARY],
page 123), the LAG function may not be used (see [LAG], page 57)."
 
It would be great if someone could implement this command in the GUI - as well as the nonparametrical tests for independent groups, e.g. the Mann-Whitney-U-Test, and "compute variable if ..." command.

Sincerely,

Oliver Walter

---
Dr. Walter Statistics
Gabelsberger Straße 27
24148 Kiel
http://www.walter-statistics.com

Am 18.01.2017 um 16:53 schrieb Aj Hollenbach:

Hi PSPP Users,

I am transitioning from SPSS to PSPP and am having some troubles with case selection. Specifically, under SPSS, I used to be able to select cases using a radio button in the Data / Select Cases dialogue box that stated "Select if condition is satisfied...". However, under PSPP, I have found that this option is not available, and that you can only select cases based upon (1) a random sample, (2) case range, or (3) a filter variable. In other words, there is no option for using the IF function for selection purposes. I am attaching screenshots from both programs.

I greatly appreciate any advice that others might have on how to best make a selection of cases using a conditional IF statement. In short, I am running analysis of household survey data, but only want to use data from a handful of the administrative jurisdictions (provinces) within the larger data set.

Regards,

Allen

PS: I am running GNU pspp 0.10.1-g1082b8

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