LAG Function

2017-06-12 Thread John Darrington
On Mon, Jun 12, 2017 at 04:22:47PM -0700, Braxton Alfred wrote: > My manual does not have a command LAG in it, The LAG function is documented in Section 7.7.9 of the PSPP manual. Regards, J' PS. When following up a question on the mailing list, please reply *to the list*, and not as a

Re: your mail

2017-06-12 Thread Ben Pfaff
PSPP (and SPSS) works with rectangular files, that is, tables where each row is a case and each column is a variable. VECTOR works across columns. LAG works across rows. Try something like this: COMPUTE julian = XDATE.TDAY(date). COMPUTE delta = julian - LAG(julian). On Mon, Jun 12, 20

Re: Welch's ANOVA with PSPP?

2017-06-12 Thread Alan Mead
I don't think so. This page says it's an option in SPSS: http://www.statisticshowto.com/welchs-anova/ When I try running ANOVA using a recent version of PSPP, the only option is to run Levene's test, it doesn't seem to produce Welch's test. This page shows how to perform the test using a spreads

Welch's ANOVA with PSPP?

2017-06-12 Thread Daniel Silverton
Is there any way to run a Welch's ANOVA with PSPP? I have data that failed the Levene's test for homogeneity of variances, and have been advised to run a Welch's ANOVA, but have been unable to figure out how to do that with PSPP (if it's possible at all) based on an online search. The version I'm u

Re: your mail

2017-06-12 Thread Ben Pfaff
The COMPUTE command that you mention creates a single variable. VECTOR takes a collection of variables and turns them into an array. You only have a single variable here (or at least you have only mentioned one variable), so VECTOR is not going to be useful. Maybe you are trying to find out the

Re: your mail

2017-06-12 Thread Ben Pfaff
On Mon, Jun 12, 2017 at 11:11:10AM -0700, Braxton Alfred wrote: > I am trying to do some analyses on medical lab tests which occur at varying > times. I need to have the number of days between tests. DATEDIFF, while > described in the manual, does not work, but even if it did I need to be able >

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2017-06-12 Thread Braxton Alfred
PSPP Users I have a problem with PSPP and would greatly appreciate some help. I am using version 0.10.4-g50f7b7 on Windows 7 Pro. I am trying to do some analyses on medical lab tests which occur at varying times. I need to have the number of days between tests. DATEDIFF, while described in