[Rd] Re: RFC: package pixmap
Friedrich Leisch
Friedrich.Leisch@ci.tuwien.ac.at
Thu, 4 Oct 2001 16:14:29 +0200
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>>>>> On Thu, 4 Oct 2001 14:29:58 +0200 (MET DST),
>>>>> Agustin Lobo (AL) wrote:
> On Thu, 4 Oct 2001, Friedrich Leisch wrote:
[...]
> I agree with the point that the upper left corner must be the
> 1,1 cell in the matrix for a "natural" display of the matrix
> as an image. But this does not mean that the matrix should be rotated.
> In all image processing packages that I know of, an image with
> 200 cols and 100 rows is displayed as a horizontal rectangle. Note
> that, if there is geometric correction to a geographic projection,
> the columns go W to E as left to right and the rows N to S as
> top to bottom. In fact,
> the "natural" display should follow the same geometry than print,
> i.e.,
>> matrix(1:12,ncol=6,nrow=2)
> [,1] [,2] [,3] [,4] [,5] [,6]
> [1,] 1 3 5 7 9 11
> [2,] 2 4 6 8 10 12
>>
> should be displayed as a horizontal rectangle.
Excactly, I agree with everything you say!
you mean it doesn't do that? which version of pixmap, which version of
R on which platform?
Using
R> x <- matrix(1:12,ncol=6,nrow=2)
R> library(pixmap)
R> plot(as.pixmap(x))
I get the attached picture, which is what you want, no?
Best,
Fritz
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