[R] image ()

Ross Ihaka ihaka at stat.auckland.ac.nz
Tue Dec 8 10:21:34 CET 1998

Zivan Karaman writes:
 > Since it is time to give our wish list regarding the image function, I'll
 > simply resubmit the message that I've sent some time ago. I would
 > appreciate being able to produce the same type of display in R as one can
 > do in S+.

The problem is that way that the numbers are aligned on the grid.  In
the R image plot, the cells on the boundary are half the width/height
of those in the middle of the plot.  This is a artifact which occurs
because I wanted to overlay contours over the image data, and have
those contours extend to the edge of the plot -- this was a cheap and
nasty way of obtaining filled contours.

We will soon have genuinely filled contours and the necessity for
doing this kind of cheap trick will go away.  I've put a review of
image on the TODO list.

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