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!


-- 
With Kind Regards,

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Zhi Jie,Zhang ,PHD
Tel:86-21-54237149   epistat@gmail.com
Dept. of Epidemiology,school of public health,Fudan University
Address:No. 138 Yi Xue Yuan Road,Shanghai,China
Postcode:200032
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