If the surface to be plotted by persp() is supplied as
a list, the x-axis label defaults to the name, in the call,
of this list --- which is usually silly.
I would suggest changing the first four lines of
persp.default() (where the x-axis label gets set) from
if (is.null(xlab))
xlab <- if (!missing(x))
deparse(substitute(x))
else "X"
to
if (is.null(xlab))
xlab <- if (!missing(x) && !is.list(x) &&
!is.matrix(x))
deparse(substitute(x))
else "X"
which makes the x-axis label default to "X" if the surface
is specified as a list.
cheers,
Rolf Turner
Current email address: rolf@maths.uwa.edu.au
Usual email address: rolf@math.unb.ca
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