PSPP-BUG: Potential bug with select random cases.

[egraig]

I believe this is the latest version since I only downloaded it a few weeks ago 
(GNU pspp 1.2.0-g0fb4db). There were no menu or any other actions prior to 
running this syntax. I basically started PSPP, fetched my data (a General 
Social Survey data file in sav form) and requested the select command. 

It is that sort command that throws the error. Selecting random cases using the 
percent option does not raise it.

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Today's Topics:

   1. Select Random Cases Bug (Eric E Graig)
   2. Re: Select Random Cases Bug (John Darrington)


----------------------------------------------------------------------

Message: 1
Date: Fri, 1 Nov 2019 15:24:18 +0000
From: Eric E Graig <address@hidden>
To: "address@hidden" <address@hidden>
Subject: PSPP-BUG: Select Random Cases Bug
Message-ID: <address@hidden>
Content-Type: text/plain; charset="utf-8"

I am attempting to select 150 cases from an sav file with 1490 cases. The 
syntax, generated by PSPP itself:

COMPUTE case_$ = $CASENUM.
COMPUTE filter_$ = case_$ > 1400.
COMPUTE rv_$ = RV.UNIFORM (0, 1).
SORT BY filter_$, rv_$.
EXECUTE.
COMPUTE filter_$ = $CASENUM.
COMPUTE filter_$ = filter_$ <= 150
EXECUTE.
SORT BY case_$.
DELETE VARIABLES case_$, rv_$.
EXECUTE.
FILTER BY filter_$.

Throws this error:

COMPUTE case_$ = $CASENUM.
COMPUTE filter_$ = case_$ > 1400.
COMPUTE rv_$ = RV.UNIFORM (0, 1).
.1-4: error: COMPUTE: Unknown command `SORT'.
SORT BY filter_$, rv_$.
EXECUTE.
COMPUTE filter_$ = $CASENUM.
COMPUTE filter_$ = filter_$ <= 150
EXECUTE.
.1-4: error: EXECUTE: Unknown command `SORT'.
SORT BY case_$.
DELETE VARIABLES case_$, rv_$.
EXECUTE.
FILTER BY filter_$.

Since I've done nothing to modify the code, I have to assume this is a bug.

Eric

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Message: 2
Date: Fri, 1 Nov 2019 16:45:09 +0100
From: John Darrington <address@hidden>
To: Eric E Graig <address@hidden>
Cc: "address@hidden" <address@hidden>
Subject: Re: PSPP-BUG: Select Random Cases Bug
Message-ID: <20191101154509.x25a2a3nup2t5347@jocasta.intra>
Content-Type: text/plain; charset=us-ascii

On Fri, Nov 01, 2019 at 03:24:18PM +0000, Eric E Graig wrote:
     I am attempting to select 150 cases from an sav file with 1490 cases. The 
syntax, generated by PSPP itself:

     COMPUTE case_$ = $CASENUM.
     COMPUTE filter_$ = case_$ > 1400.
     COMPUTE rv_$ = RV.UNIFORM (0, 1).
     SORT BY filter_$, rv_$.
     EXECUTE.
     COMPUTE filter_$ = $CASENUM.
     COMPUTE filter_$ = filter_$ <= 150
     EXECUTE.
     SORT BY case_$.
     DELETE VARIABLES case_$, rv_$.
     EXECUTE.
     FILTER BY filter_$.

     Throws this error:

     COMPUTE case_$ = $CASENUM.
     COMPUTE filter_$ = case_$ > 1400.
     COMPUTE rv_$ = RV.UNIFORM (0, 1).
     .1-4: error: COMPUTE: Unknown command `SORT'.
     SORT BY filter_$, rv_$.
     EXECUTE.
     COMPUTE filter_$ = $CASENUM.
     COMPUTE filter_$ = filter_$ <= 150
     EXECUTE.
     .1-4: error: EXECUTE: Unknown command `SORT'.
     SORT BY case_$.
     DELETE VARIABLES case_$, rv_$.
     EXECUTE.
     FILTER BY filter_$.

     Since I've done nothing to modify the code, I have to assume this is a bug.

On the face of it, it sounds like it.

However you haven't said

1) Which version of pspp you are using (perhaps it is a bug which has already 
been fixed).

2) Exactly what did you do (what sequence of menu actions did you
perform) to provoke this behaviour.

If you can provide this information, the hopefully we can investigate and if 
necessary correct the problem.

Regards,

John




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