[R] Changing the ranges for the axis in image()
Sundar Dorai-Raj
sundar.dorai-raj at pdf.com
Tue Jan 11 16:01:31 CET 2005
Costas Vorlow wrote:
> Dear all,
>
> I can not find/understand the solution to this from the help pages:
>
> Say we have the following script:
>
> x<-matrix(c(1,1,0,1,0,1,0,1,1),3,3)
> image(x)
>
> How can I change the ranges on the vertical and horizontal axis to a
> range of my own or at least place a box frame around the image if I
> choose to use "axes=FALSE"?
>
> Apologies for such a bsic question and thanks beforehand for your answers.
>
From ?image:
## Default S3 method:
image(x, y, z, zlim, xlim, ylim, col = heat.colors(12),
add = FALSE, xaxs = "i", yaxs = "i", xlab, ylab,
breaks, oldstyle = FALSE, ...)
Unless I misunderstood your question, the zlim, xlim, and ylim arguments
should give you what you want.
--sundar
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