[R] z limits

John Dougherty jwd at surewest.net
Mon May 9 02:44:27 CEST 2005

On Sunday 08 May 2005 16:32, Jennifer Skene wrote:
> Hello,
> I am using R to run a program called GRASP - Generalized Regression
> Analysis and Spatial Prediction.
> I am trying to draw a figure using GRASP, and I get the following
> error message in R:
> Error in image.default(map, col = heat.colors(12)) :
> 	invalid z limits
> What are z limits?  Can I manually set them?
> Please let me know if you have any insight on this!
> Thanks,
> Jennifer Skene

I believe that the "z" limits in GRASP relate to the third dimensional 
variable.  If you are using spatial data that uses either altitude or another 
variable that gives a pseudo-surface, you should probably check the 
variable's range.


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