Hello,
Yes, this is definitely a bug.
Even the matrix plot is puzzling, with a "1" as top row sort-of-label
but no grid line. I'm trying to follow the source code of dotchart but
am yet to understand exactly what it does to decide the margins settings.
if (!(is.null(labels) && is.null(glabels))) {
nmai <- par("mai")
nmai[2L] <- nmai[4L] + max(linch + goffset, ginch) +
0.1
par(mai = nmai)
}
This should be moved to r-devel?
Rui Barradas
Às 03:33 de 17/02/20, Alexey Shipunov escreveu:
John and Rui, thanks!
However, if we use the proper object, the problem still persists:
dotchart(c("3"=1, "2"=2, "1"=3), ylab="Ylab") # ylab is invisible
dotchart(c("aa"=1, "b"=2, "cc"=3), ylab="Ylab") # ylab is partly visible (!!!)
dotchart(c("aaa"=1, "bbb"=2, "ccc"=3), ylab="Ylab") # ylab is well visible
If the object is matrix, ylab is visible:
dotchart(matrix(1:3, dimnames=list(c("aa","bb","cc"), NULL)), ylab="Ylab")
But the ?dotchart explicitly says that "x: either a vector or matrix
of numeric values" and then "labels: a vector of labels for each
point. For vectors the default is to use ‘names(x)’ ...".
So this is likely a bug. Do you agree?
Alexey
пн, 17 февр. 2020 г. в 01:55, Rui Barradas <ruipbarra...@sapo.pt>:
Hello,
I believe you are wrong, the error is not in dotchart, it's in your
code. You assume that to plot an object of class "table" is the same as
to plot an object of class "numeric".
Inline.
Às 12:21 de 16/02/20, Alexey Shipunov escreveu:
Dear list,
I have been advised to share these with R-help instead of filling the
bug report:
1) dotchart() does not allow to see the left axis title ('ylab') and
cannot change the left margin (outer margin 2) of the plot
The code:
aa <- table(c(1, 1, 1, 2, 2, 3))
dotchart(aa, ylab="Ylab") # does not show 'ylab'
You are right, it does *not* show 'ylab' but the user is warned.
aa <- table(c(1, 1, 1, 2, 2, 3))
dotchart(aa, ylab = "Ylab") # does show 'ylab'
#Warning message:
#In dotchart(aa, ylab = "Ylab") :
# 'x' is neither a vector nor a matrix: using as.numeric(x)
My code:
(mar <- par("mar")) # new R session
#[1] 5.1 4.1 4.1 2.1 # the left margin is 4.1
aa <- as.numeric(table(c(1, 1, 1, 2, 2, 3)))
dotchart(aa, ylab = "Ylab") # It does show 'ylab'
old.par <- par(mar = mar + c(0, 5, 0, 0))
par("mar")
#[1] 5.1 9.1 4.1 2.1
dotchart(aa, ylab = "Ylab") # The left margin is now 9.1, much bigger
par(old.par) # It does change the left margin
dotchart(aa, ylab = "Ylab") # but only when a new graph is plotted.
old.par <- par(mar=c(1, 10, 1, 1)) ; dotchart(aa, ylab="Ylab") ;
par(old.par) # does not change left margin
Possible solution:
I researched the problem and think that the dotchart() code will need
few corrections. If there is an interest, I can post it here; or you
can look at the code of shipunov::Dotchart1() function.
2) example(hist) includes two "wrong" and "extreme" examples which
slow down and even crash R on some systems; this make it unsuitable
for demonstration in the class and strikes beginners in R who just
want to understand how hist() works. Actually, I did it last week (I
was not aware of these examples), and in the class two computers hang,
and many others were extremely slow.
The code:
example(hist)
Possible solution:
If R maintainers will enclose parts of "hist" example in \dontrun{},
this will allow to see the code but in the same time will not strike
beginners in R who just
want to understand how hist() works. They will still be possible to
run with example(..., run.dontrun=TRUE).
Agree, it's annoying. Sometimes there's a Warning section after the
Details section. Maybe such a section could get users' attention to
those examples? At least it wouldn't hurt...
Hope this helps,
Rui Barradas
With best wishes,
Alexey Shipunov
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