R help - Nov 2006 - plot questions?-errors in persp(x1, x2, y) and contour(x1, x2, y)

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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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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zhijie zhang wrote:
> 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.

Well, your x and y coordinates must be equidistant and z a corresponding 
matrix. Please read the help files. If you cannot provide this data, a 
grid seems inappropriate.

For a book: Paul Murrell wrote some nice book about "R Graphics".

Uwe Ligges

> 
> On 11/7/06, Uwe Ligges <ligges at 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
>>
> 
> 
>