[R] Problem with plotmat package

[Jim Lemon]

Oops, your plot

On Thu, Sep 16, 2021 at 11:39 AM Jim Lemon <drjimlemon using gmail.com> wrote:
>
> Hi H,
> Looking at your example and the help page, it looks to me as though
> the plot is consistent with the "A" matrix:
>
>  Oz
>     Rain Nice
> Rain 0.25 0.75
> Nice 0.60 0.40
>
> # help page
> A  - square coefficient matrix, specifying the links (rows=to, cols=from).
>
> In your plot (attached):
> Rain (col) goes to Rain (row) 0.25
> Rain (col) goes to Nice (row) 0.6
> Nice (col) goes to Nice (row) 0.4
> Nice (col) goes to Rain (row) 0.75
>
> This is a bit confusing, but it seems to do what it says it does.
>
> Jim
>
> On Thu, Sep 16, 2021 at 10:40 AM H <agents using meddatainc.com> wrote:
> >
> > I am using plotmat 1.6.5 (part of the diagram package) in R 3.6 to plot Markov transition charts but have run into an issue that I was hoping someone could shed light on here. I did e-mail the maintainer over a month ago but have not received a reply.
> >
> > The issue is that the directional arrows point in the wrong direction. A brief example:
> >
> > stateNames <- c("Rain", "Nice")
> > Oz <- matrix(c(0.25, 0.75, 0.6, 0.4), nrow = 2, byrow = TRUE)
> > rownames(Oz) <- stateNames; colnames(Oz) <- stateNames
> > plotmat(Oz, pos = c(1, 1), lwd = 1, box.lwd = 2, cex.txt = 0.8, box.size = 0.1, box.type = "circle", box.prop = 0.5, box.col = "light yellow", arr.length = 0.2, arr.width = 0.2, self.cex = 0.4, self.shifty = 0.01, self.shiftx = 0.13, main = "")
> >
> > In the above example both arrows seem to point in the direction opposite to what I expect. Has anyone encountered this and know how to fix it?
> >
> > Thanks.
> >
> > ______________________________________________
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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.

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