Tahereh Dehdarirad
2016-Sep-06 13:08 UTC
[R] Factor analysis and time as an offset variable
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]]
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]] > >______________________________________________ >R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see >https://stat.ethz.ch/mailman/listinfo/r-help >PLEASE do read the posting guide >http://www.R-project.org/posting-guide.html >and provide commented, minimal, self-contained, reproducible code.
Tahereh Dehdarirad
2016-Sep-06 14:38 UTC
[R] Factor analysis and time as an offset variable
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. Best, Tahereh 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> wrote:> 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]] > > > >______________________________________________ > >R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see > >https://stat.ethz.ch/mailman/listinfo/r-help > >PLEASE do read the posting guide > >http://www.R-project.org/posting-guide.html > >and provide commented, minimal, self-contained, reproducible code. > >[[alternative HTML version deleted]]