Thanks for the link John.
It says: "Send an email to the developers and ask for the feature. The
developers are interested in hearing about what users want."...
... but nowhere on that page does it give email addresses for the developers.
When I get a block of free time, I'll rummage around the site and see if I can
find them.
From: John Darrington <j...@darrington.wattle.id.au>
To: Ether <eth...@ymail.com>
Cc: John Darrington <j...@darrington.wattle.id.au>; "pspp-users@gnu.org"
<pspp-users@gnu.org>
Sent: Saturday, September 3, 2016 4:46 PM
Subject: Re: PSPP multiple linear regression with Y intercept equal zero
There are some tips on how to get missing features implemented here:
http://www.gnu.org/software/pspp/faq.html#MissingFeatures
On Sat, Sep 03, 2016 at 05:08:20PM +0000, Ether wrote:
Thanks for replying John.
Actually, what I want is the /ORIGIN command (force model to go through
origin; i.e. no const term).
I can't fake it by adding a dummy variable with all cases set to zero for
three reasons:
1) PSPP does not support weighted multiple linear regression, so adding a
single dummy variable to a dataset which already contains hundreds of data
points would not force the model's Y intercept to be zero
2) Without weighting, it would be necessary to add hundreds (if not
thousands) of dummy data points to force the model's Y intercept to be
zero.???? This would be unwieldy.
3) Adding hundreds (or thousands) of dummy data points would skew other
statistical measures I am interested in.
The following free statistics programs all support zero Y-intercept (no
const term) multiple linear regression models:
gretl
R
Octave
Tanagra
ASP
MicrOsiris
LibreOffice Calc
So why don't I just use one of them instead??? Well, I have and I do.?? But
I have several applications where I want to use PSPP; for example when working
with students with prior exposure to SPSS.
From: John Darrington <j...@darrington.wattle.id.au>
To: Ether <eth...@ymail.com>
Cc: "pspp-users@gnu.org" <pspp-users@gnu.org>
Sent: Thursday, September 1, 2016 7:57 PM
Subject: Re: PSPP multiple linear regression with Y intercept equal zero
Ether,
I'm not an expert on linear regression, but I think you are looking for the
/NOORIGIN
subcommand which unfortunately at the moment PSPP doesn't have.
If this is important to you, file a "wishlist" bug and we'll ses what we
can do.
In the mean time, you can "fake it" by adding a dummy variable with all
cases set
to zero.
J'
On Thu, Sep 01, 2016 at 09:33:32PM +0000, Ether wrote:
?? ??
?? ?? Only 2 posts to the PSPP mailing list in the past 7 days.
?? ?? Is there a more active PSPP mailing list (or better yet, forum)
somewhere?
?? ??
?? ??
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