you are right, it shows False for all variables.

The use.value.labels switch is not on, it does not work also when I type
number manually in notepad (csv) or excel.

Is there a way to force the variables to numeric?


On 11 June 2012 12:23, William Revelle <lists@revelle.net> wrote:

> Dear codecat,
>  To track down where the trouble is, try
>
> lapply(my.data,is.numeric)
>
> That will tell you which column of your data is giving you problems.
>
> It is possible that you read the data in from SPSS and did not turn off
> the use.value.labels switch.
>
>
> On Jun 11, 2012, at 1:55 AM, codec cat wrote:
>
> > Hi
> >
> > I keep having this error when I used omega(my.data)
> > Error in cor(m, use = "pairwise") : 'x' must be numeric
> >
> > I'm quite sure my data is numeric as I have tried several methods such
> as opening csv in notepad and make sure the number is not string, also
> tried SPSS and make sure the numbers are set to numeric..
> >
> > can somebody advice me what is wrong.
> >
> >
> >
> > Thanks.
> >
> >
> >
> >
> > On 11 June 2012 04:17, William Revelle <lists@revelle.net> wrote:
> > Dear "codecat"
> >
> > You can get the most recent version of psych from CRAN.  The current
> version is 1.2.4.
> >
> > Then, the help page for omega should be of use
> >
> > library(psych)
> > ?omega
> >
> > In addition, try the vignette for the psych package.
> >
> > Or, as of today, there is a more detailed instruction for newbies on
> using the psych package and R to find omega
> >
> > http://personality-project.org/r/tutorials/R_for_omega.pdf
> >
> > Let me know if any of this helps.
> >
> > Bill
> >
> >
> > On Jun 10, 2012, at 4:00 PM, codec cat wrote:
> >
> > > Dear all
> > >
> > > I am a newbie to R and I would appreciate it very much if someone can
> > > give me some advice on this.
> > >
> > > Please note that I am not a programmer so some of the questions might
> > > sound really stupid.
> > >
> > >
> > > I would like to compute McDonald's omega calculation using R, I'm
> > > aware I can use the omega function in the psych package.
> > >
> > > But I'm really not sure how to do it.
> > >
> > >
> > > I have read these two articles that explain about omega-
> > >
> > >
> > > http://personality-project.org/r/html/omega.html and
> > > http://personality-project.org/r/r.omega.html
> > >
> > >
> > > But I'm still not sure how to do it.
> > >
> > >
> > > Can someone correct me what I have gone wrong.
> > >
> > >
> > > I'm following the instruction from this site and I have downloaded the
> > > psych package- http://personality-project.org/r/
> > >
> > >
> > > *1. Load and read the data*
> > >
> > >
> > > datafilename <- file.choose()     # use the OS to find the file
> > >
> > > person.data  <- read.table(datafilename,header=TRUE)  #read the data
> file
> > >
> > >
> > >
> > > *2. Use the code examples from
> http://personality-project.org/r/r.omega.html*
> > >
> > >
> > > Copy and paste the whole code from this website in the R console
> > >
> > >
> > >
> > > I know I must have understood Step 2 incorrectly, but I am really not
> > > sure what to do with the omega function.
> > >
> > >
> > > Can someone give me more specific help on this please.
> > >
> > >
> > > Thanks.
> > >
> > >       [[alternative HTML version deleted]]
> > >
> > > ______________________________________________
> > > R-help@r-project.org mailing list
> > > 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.
> > >
> >
> > William Revelle
> http://personality-project.org/revelle.html
> > Professor
> http://personality-project.org
> > Department of Psychology   http://www.wcas.northwestern.edu/psych/
> > Northwestern University    http://www.northwestern.edu/
> > Use R for psychology             http://personality-project.org/r
> > It is 5 minutes to midnight        http://www.thebulletin.org
> >
> >
> >
> >
> >
>
> William Revelle
> http://personality-project.org/revelle.html
> Professor                                  http://personality-project.org
> Department of Psychology   http://www.wcas.northwestern.edu/psych/
> Northwestern University    http://www.northwestern.edu/
> Use R for psychology             http://personality-project.org/r
> It is 5 minutes to midnight        http://www.thebulletin.org
>
>
>
>
>

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