 Dear Uwe Ligges ,
  I still can't finish it.
*> aa*   #my data
    x1 x2      y
5    0.05  6 4.4180
1    0.50  3 2.6979
4    0.50  9 2.9000
7    0.95  6 2.6230
8    0.95  6 2.9078
9    0.95  6 2.6727
3    1.40  3 2.4203
2    1.40  9 2.5329
6   1.85  6 2.4867
*> attach(aa)*
*> persp(x1,x2,y*
error in persp.default(x1, x2, y) : increasing 'x' and 'y' values expected
*> contour(x1,x2,y)*
error in contour.default(x1, x2, y) : increasing 'x' and 'y' values expected
What's the problem? And could u recommend a book for me?
Thanks again.


On 11/7/06, Uwe Ligges <ligges@statistik.uni-dortmund.de> wrote:
>
>
>
> zhijie zhang wrote:
> > Dear Rusers,
> >   I want to know which function in R can perform the following tasks:
> > 1.surface-data grid(x,y,z)  #which could be done in splus, the name was
> from
> > splus's options of graph
> > 2. contourplot(x,y,z)     #which could be done in splus
> > By the way, where can i find some useful materials to learn to plot
> > 3-dimensionel graphs?
> > Thanks!
> >
>
> 1. persp()
> 2. contour()
> 3. E.g., look into a good book about R.
>
> Uwe Ligges
>



-- 
With Kind Regards,

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Dept. of Epidemiology,school of public health,Fudan University
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