[R] Factor analysis and time as an offset variable

Tahereh Dehdarirad tdehdari at gmail.com
Tue Sep 6 16:38:26 CEST 2016

Thank you for your reply. I am grouping citation and some social media
indictors ( number of tweets, mendeley readers, etc). The number of
citaions a paper recievs or the number of social media indicators that a
papers receives depends on time. For example a paper published in 2009 has
more time to get citation than a paper pubished lets say in year 2016.

That is the reason I like to consider  time ( in my case the number of
years) a paper has been to the exposure of receiving citations in the
factor analysis.



Tahereh Dehdarirad
PhD Student of Library and Information Science
University of Barcelona, Spain

On Tue, Sep 6, 2016 at 4:31 PM, Jeff Newmiller <jdnewmil at dcn.davis.ca.us>

> That step is easy, but context is hard. You really need to provide a
> reproducible example. There are many models, many analysis tools,  and many
> timescales to choose from. In fact, this could easily be mistaken for a
> question about statistics (not really on-topic here) since you have failed
> to indicate what any of your constraints or decisions in those areas are.
> It may be as simple as you not knowing about date or POSIXt arithmetic
> (see ?DateTimeClasses).
> --
> Sent from my phone. Please excuse my brevity.
> On September 6, 2016 6:08:41 AM PDT, Tahereh Dehdarirad <
> tdehdari at gmail.com> wrote:
> >Hi,
> >
> >Is it possible to use time as an offset (exposure variable) in factor
> >analysis? If yes, would you please advise how?
> >
> >
> >Thanks,
> >
> >Tahereh
> >
> >
> >
> >
> >Tahereh Dehdarirad
> >PhD Student of Library and Information Science
> >University of Barcelona, Spain
> >
> >       [[alternative HTML version deleted]]
> >
> >______________________________________________
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> >and provide commented, minimal, self-contained, reproducible code.

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