[R] Plotting function image

[ilai]

In the absence of data

coords <- expand.grid(lat=1:5,long=1:5)
coords$z <- rnorm(25)
Coords<- unstack(coords,z~long)
image(as.matrix(Coords))


On Tue, Feb 14, 2012 at 10:36 AM, uday <uday_143_4u at hotmail.com> wrote:
> I have some data set which has latitude, longitude and Z values.
> I would like to plot them on global map.
> I am thinking to use image
> image(x, y, z, zlim, xlim, ylim, col = heat.colors(12),
>      add = FALSE, xaxs = "i", yaxs = "i", xlab, ylab,
>      breaks, oldstyle = FALSE, useRaster = FALSE, ...)
>
> here I have x = longitude
>                       y= latitude
>                      z = z
>
> but z suppose to be matrix but my z values are  single array , could
> somebody please tell me how to convert these single array of z to matrix ?
>
>
>
> --
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