[R] Smallest Space Analysis (SSA) in R

[Andrew]

Hi Martin

I was aware of the 'old' MDS package, thanks.

Hi Eric

I've now read the paper you referenced, thanks. Still didn't see 
anything about SSA however, so will keep looking.

However, if anyone on this list comes across something specific to SSA, 
could you kindly drop me a line to let me know?

Many thanks
Andrew


On 21/09/18 07:46, Martin Maechler wrote:
>>>>>> Eric Berger
>>>>>>      on Thu, 20 Sep 2018 23:28:27 +0300 writes:
>      > Hi Andrew,
>      > I don't have any experience in this area but I was intrigued by your
>      > question. Here is what I learned.
>
>      > 1, A bit of poking around turned up a thread on stats.stackexchange that
>      > mentions that "smallest space analysis" (SSA) is a special case of
>      > "multidimensional scaling" (MDS).
>      > See the thread here:
>      > https://stats.stackexchange.com/questions/82462/guttmans-smallest-space-analysis
>
>      > 2. The R package SMACOF implements some solutions for MDS. See the
>      > documentation "Multidimensional Scaling in R: SMACOF" available at
>      > https://mran.microsoft.com/snapshot/2018-05-13/web/packages/smacof/vignettes/smacof.pdf
>
> Well, but MDS  is "old" and already available in standard R in
> its classical form:
>
>> apropos("MDS")
> [1] "cmdscale"
>> ?cmdscale  # "Classical Multidimensional Scaling"
> then gives the help page for 'cmdscale' which in its 'See Also:'
> mentions the
>
> 	isomds()
> 	sammon()
>
> functions from package MASS which (as formally "Recommended"
> pkg) is part of every full R installation.
>
> So, at first, there's no need for any extra package...
>
>
>      > HTH,
>      > Eric
>
>
>
>      > On Wed, Sep 19, 2018 at 2:00 PM, Andrew <phaedrusv using gmail.com> wrote:
>
>      >> Hi
>      >>
>      >> As part of my forensics psych course, we have been introduced to
>      >> Guttman's smallest space analysis (SSA). I want to explore this approach
>      >> using R, but despite finding some queries on the web about this same
>      >> thing, have yet to find any answers. The MASS package doesn't seem to do
>      >> the job, and the only thing I have been able to find is some proprietary
>      >> software HUDAP  (Hebrew University Data Analysis Package) which may/ not
>      >> be compatible with R (or GNU/Linux for that matter).
>      >>
>      >> Does anyone have information on how to do SSA using R?
>      >>
>      >> Many thanks
>      >>
>      >> Andrew
>      >>
>      >>
>      >> [[alternative HTML version deleted]]
>      >>
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>      >>
>
>      > [[alternative HTML version deleted]]
>
>      > ______________________________________________
>      > R-help using r-project.org mailing list -- To UNSUBSCRIBE and more, see
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>      > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
>      > and provide commented, minimal, self-contained, reproducible code.
>