[R] troubleshooting data structure to run krippendorff's alpha

[Hallie Kamesch]

Thank you Jim, for the code, and thank you Jeff for the tutorial PDF.  I've
read through the sections and I appreciate the help.
I'm in way over my head - I don't even understand enough of the vocabulary
to ask my question correctly.
Jim, in your code, I ended up with an entry of 4 observations of 6
variables. I understand how that happened now since I read your code - that
helped very much.
My only problem, that I can't figure out, is how to make it so I have 3
raters with 4 observations of 6 variables.
I really am trying to educate myself enough to not waste your time:  I've
?data.frame, ?sample, ?matrix, ?$names, ?attributes, etc... I read the
sections in Jeff's PDF, and the tutorials on datamentor, I'm just not
finding how to do this. I'm sorry this is such a newbie question.
thank you for your time,
hallie

On Mon, Jan 28, 2019 at 1:21 PM Hallie Kamesch <hallie.kamesch using gmail.com>
wrote:

> Hi all,
> Thank you for your responses. You are correct that it is not a matrix. I
> used the incorrect term.
> I meant I put my data in a spreadsheet with three rows and 24 columns.
>
> Sent from my iPhone
>
> > On Jan 28, 2019, at 3:36 AM, Jim Lemon <drjimlemon using gmail.com> wrote:
> >
> > Hi Halllie,
> > As Jeff noted, a data frame is not a matrix (it is a variety of list),
> > so that looks like your problem.
> >
> >
> hkdf<-data.frame(sample(3:5,4,TRUE),sample(1:3,4,TRUE),sample(2:4,4,TRUE),
> > sample(3:5,4,TRUE),sample(1:3,4,TRUE),sample(2:4,4,TRUE))
> > library(irr)
> > kripp.alpha(hkdf)
> > kripp.alpha(as.matrix(hkdf))
> >
> > Jim
> >
> >> On Mon, Jan 28, 2019 at 6:04 PM Hallie Kamesch <
> hallie.kamesch using gmail.com> wrote:
> >>
> >> Hi -
> >> I'm trying to run Krippendorff's alpha for data consisting of 4 subjects
> >> rated on 6 events each by three raters.  The ratings are interval ratio
> >> scale data.
> >>
> >> I've rearranged my data into a 3 x 24  of ratersXevents. (per this
> >> discussion on CrossValidated: (
> >>
> https://stats.stackexchange.com/questions/255164/inter-rater-reliability-for-binomial-repeated-ratings-from-two-or-more-raters/256144#256144
> )
> >> ).
> >>
> >> This is the code I've used:
> >> library(irr)
> >> dat <- read.csv(file.choose(), header = TRUE)
> >> head(dat)
> >> kripp.alpha(dat, method=c("ratio"))
> >> #### error message: Error in sort.list(y) : 'x' must be atomic for
> >> 'sort.list'
> >> Have you called 'sort' on a list?
> >> kripp.alpha(dat,"ratio")
> >> #### error message: Error in sort.list(y) : 'x' must be atomic for
> >> 'sort.list'
> >> Have you called 'sort' on a list?
> >>
> >> I read rhelp on sort, but I'm still confused.  Please help!
> >> Thank you!
> >>
> >> PS
> >> I arranged my data in that matrix based upon this comment and response
> from
> >> the CrossValidated posting forum (
> >>
> https://stats.stackexchange.com/questions/255164/inter-rater-reliability-for-binomial-repeated-ratings-from-two-or-more-raters/256144#256144
> ),
> >> but my question above was rejected there.
> >>
> >>        [[alternative HTML version deleted]]
> >>
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> http://www.R-project.org/posting-guide.html
> >> and provide commented, minimal, self-contained, reproducible code.
>

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