Thanks Lionel, Lets see what I can do. A amjor issue is that  I need toe
keep pair of values (id, direction) and maintaining this pair relation
while spreading them in different layers becomes problematic.

Again thanks,


On Fri, Sep 27, 2013 at 2:57 PM, Lionel <s6lihert@uni-bonn.de> wrote:

> Dear Shahab,
>
> Indeed each raster cell should contain an unique value, I guess this is
> part of the definition of what a raster is. What you could do is put your
> different variable (id, direction) in different layer of a raster stack.
> See ?stack for example.
>
> Yours,
> Lionel
>
>
> On 09/27/2013 02:33 PM, shahab wrote:
>
>> Hi,
>>
>> I am quite new to Raster library and a bit confused.
>> Basically I would like to raster an area, and then place information
>> (Identifuer, Direction) in each cell ,as follows:
>>
>>  myraster<-raster()
>>>   myraster[1:3]<-list(id=c(1),**direction=c(14,20))
>>>
>> Error in min(vals) : invalid 'type' (list) of argument
>> In addition: Warning message:
>> In .replace(x, i = i, value = value, recycle = 1) :
>>    number of items to replace is not a multiple of replacement length
>>
>>
>> It seems to me that I can not put an object of type List,or vector,...in
>> the cells??
>>
>> If this is the case, what would be the alternative solutions?
>>
>> /Shahab
>>
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