Don,
Pablo and I have been through all that. The structure of the "im"
object was fine. I had no problem at all plotting the image on my
system. Pablo could get nothing but blank plots on his system. The
problem arose, as he said in a post just now, only on his personal machine.
The problem seems to be peculiar to Windoze XP. I've no idea just how
or why it arises however. Without being able to sit down at Pablo's
machine (or Chris's machine) and experiment, it is very hard to diagnose
the problem.
cheers,
Rolf
On 19/06/14 04:39, MacQueen, Don wrote:
On my system (see info at the end) the plot succeeds.
Can you plot other objects of class "im"?
(see ?im for examples)
Has it even been determined if the problem is with (a) the plotting
process, or (b) the structure of the object being plotted?
To check the structure of the object, you might wish to compare with:
tmp <- density(redwood)
class(tmp)
[1] "im"
str(tmp)
List of 10
$ v : num [1:128, 1:128] 12.8 13.2 13.7 14.2 14.7 ...
$ dim : int [1:2] 128 128
$ xrange: num [1:2] 0 1
$ yrange: num [1:2] -1 0
$ xstep : num 0.00781
$ ystep : num 0.00781
$ xcol : num [1:128] 0.00391 0.01172 0.01953 0.02734 0.03516 ...
$ yrow : num [1:128] -0.996 -0.988 -0.98 -0.973 -0.965 ...
$ type : chr "real"
$ units :List of 3
..$ singular : chr "unit"
..$ plural : chr "units"
..$ multiplier: num 1
..- attr(*, "class")= chr "units"
- attr(*, "class")= chr "im"
- attr(*, "sigma")= num 0.125
Using tmp as created above, does
image(list(x=tmp$xcol, y=tmp$yrow, z=t(tmp$v)),asp=1)
succeed?
version
_
platform x86_64-apple-darwin10.8.0
arch x86_64
os darwin10.8.0
system x86_64, darwin10.8.0
status
major 3
minor 0.2
year 2013
month 09
day 25
svn rev 63987
language R
version.string R version 3.0.2 (2013-09-25)
nickname Frisbee Sailing
spatstat 1.36-0
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