Species richness (from 3 to 20 more or less)

On 07/11/2010 06:46 a.m., Paul Hiemstra wrote:
> What is the data captured by the tif file?
>
> Paul
>
> On 11/07/2010 12:45 PM, Manuel Spínola wrote:
>> Thank you very much Paul.
>>
>> This is the data frame that I created
>>
>> > head(riquezakrig_df)
>>         band1    band2    band3        x       y
>> 269  1.760396 1.620212 1.272875 460590.1 1216391
>> 1686 1.760396 1.620212 1.272875 460540.1 1216341
>> 1687 1.760396 1.620212 1.272875 460590.1 1216341
>> 3103 1.760396 1.620212 1.272875 460490.1 1216291
>> 3104 1.760396 1.620212 1.272875 460540.1 1216291
>> 3105 1.760396 1.620212 1.272875 460590.1 1216291
>>
>>
>> You suggest to make a new column with the color, but I don't 
>> understand which information should I provide to the new column.
>>
>> Best,
>>
>> Manuel
>>
>>
>> On 07/11/2010 04:00 a.m., Paul Hiemstra wrote:
>>> Hi Manuel,
>>>
>>> Please do not respond to me alone, include the mailing list in the 
>>> cc. You waste the option of someone else answering your question and 
>>> the answers are not stored in the archives for other people.
>>>
>>> But back to your question. The tiff file has 3 bands, rgb bands. 
>>> Probably the contents in those bands is a number between 0 and 255, 
>>> but you do not specify this in your mail. In this case the tiff file 
>>> does not contain the 'real' values but is a picture. So drawing 
>>> individual bands does not make sense. What you could try is to 
>>> construct a new column in the dataset with the color and try to use 
>>> in the aes() argument (col = col, where col is the name of the 
>>> column with the color).
>>>
>>> cheers,
>>> Paul
>>>
>>>
>>> On 11/06/2010 03:03 PM, Paul Hiemstra wrote:
>>>> Gpplot cannot plot SpatialPixelsDataFrame's in one go. You need to
>>>> convert the grid to a data frame.
>>>>
>>>> An example using the meuse dataset:
>>>>
>>>> library(sp)
>>>> library(ggplot2)
>>>> data(meuse.grid)
>>>> gridded(meuse.grid) = ~x+y
>>>> summary(meuse.grid)
>>>>
>>>> meuse.grid_df = as(meuse.grid, "data.frame")
>>>>
>>>> # Now make a plot with ggplot
>>>> p = ggplot(aes(x = x, y = y, fill = dist), data = meuse.grid_df) +
>>>>     geom_tile()
>>>> print(p)
>>>>
>>>> # Add some tricks specially suitable for
>>>> # spatial plots
>>>> print(p +
>>>>        scale_x_continuous('', labels = NA, breaks = NA) +
>>>>        scale_y_continuous('', labels = NA, breaks = NA) +
>>>>       opts(aspect.ratio = 1, alpha = 0.5))
>>>>
>>>> cheers,
>>>> Paul
>>>>
>>>> On 11/06/2010 02:28 PM, Manuel Spínola wrote:
>>>>    
>>>>> Thank you very much Paul.
>>>>>
>>>>> With plot I got a black polygon and with spplpot I got:
>>>>>
>>>>>      
>>>>>> spplot(riquezakrig)
>>>>>>        
>>>>> Error: cannot allocate vector of size 22.6 Mb
>>>>>
>>>>> with image show me what I want but no legend.
>>>>>
>>>>> Any specific geom to plot with ggplot?
>>>>>
>>>>> Best,
>>>>>
>>>>> Manuel
>>>>>
>>>>> On 06/11/2010 06:46 a.m., Paul Hiemstra wrote:
>>>>>      
>>>>>> On 11/06/2010 11:15 AM, Manuel Spínola wrote:
>>>>>>        
>>>>>>> Dear list members,
>>>>>>>
>>>>>>> I read a .tif file with readGDAL.
>>>>>>> What is the best way to display it?.
>>>>>>>
>>>>>>>          
>>>>>> spplot or ggplot
>>>>>>        
>>>>>>> I tried function image but there is no legend.
>>>>>>>
>>>>>>>          
>>>>>> true
>>>>>>        
>>>>>>> I tried plot and spplot but I couldn't get them to work.
>>>>>>>
>>>>>>>          
>>>>>> why not? What error? What version of R and sp? You're not giving us
>>>>>> any information that could give us a clue to what's going wrong.
>>>>>>
>>>>>> cheers,
>>>>>> Paul
>>>>>>        
>>>>>>> Any help will be appreciated.
>>>>>>>
>>>>>>> Best,
>>>>>>>
>>>>>>> Manuel
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> _______________________________________________
>>>>>>> R-sig-Geo mailing list
>>>>>>> R-sig-Geo@stat.math.ethz.ch
>>>>>>> https://stat.ethz.ch/mailman/listinfo/r-sig-geo
>>>>>>>
>>>>>>>          
>>>>>> -- 
>>>>>> Drs. Paul Hiemstra
>>>>>> Department of Physical Geography
>>>>>> Faculty of Geosciences
>>>>>> University of Utrecht
>>>>>> Heidelberglaan 2
>>>>>> P.O. Box 80.115
>>>>>> 3508 TC Utrecht
>>>>>> Phone:  +3130 253 5773
>>>>>> http://intamap.geo.uu.nl/~paul
>>>>>> http://nl.linkedin.com/pub/paul-hiemstra/20/30b/770
>>>>>>        
>>>>> -- 
>>>>> *Manuel Spínola, Ph.D.*
>>>>> Instituto Internacional en Conservación y Manejo de Vida Silvestre
>>>>> Universidad Nacional
>>>>> Apartado 1350-3000
>>>>> Heredia
>>>>> COSTA RICA
>>>>> mspinola@una.ac.cr
>>>>> mspinola10@gmail.com
>>>>> Teléfono: (506) 2277-3598
>>>>> Fax: (506) 2237-7036
>>>>> Personal website: Lobito de río
>>>>> <https://sites.google.com/site/lobitoderio/>
>>>>> Institutional website: ICOMVIS<http://www.icomvis.una.ac.cr/>
>>>>>      
>>>>    
>>>>
>>>>
>>>> _______________________________________________
>>>> R-sig-Geo mailing list
>>>> R-sig-Geo@stat.math.ethz.ch
>>>> https://stat.ethz.ch/mailman/listinfo/r-sig-geo
>>>>    
>>>
>>>
>>> -- 
>>> Drs. Paul Hiemstra
>>> Department of Physical Geography
>>> Faculty of Geosciences
>>> University of Utrecht
>>> Heidelberglaan 2
>>> P.O. Box 80.115
>>> 3508 TC Utrecht
>>> Phone:  +3130 253 5773
>>> http://intamap.geo.uu.nl/~paul
>>> http://nl.linkedin.com/pub/paul-hiemstra/20/30b/770
>>
>>
>> -- 
>> *Manuel Spínola, Ph.D.*
>> Instituto Internacional en Conservación y Manejo de Vida Silvestre
>> Universidad Nacional
>> Apartado 1350-3000
>> Heredia
>> COSTA RICA
>> mspinola@una.ac.cr
>> mspinola10@gmail.com
>> Teléfono: (506) 2277-3598
>> Fax: (506) 2237-7036
>> Personal website: Lobito de río 
>> <https://sites.google.com/site/lobitoderio/>
>> Institutional website: ICOMVIS <http://www.icomvis.una.ac.cr/>
>
>
> -- 
> Drs. Paul Hiemstra
> Department of Physical Geography
> Faculty of Geosciences
> University of Utrecht
> Heidelberglaan 2
> P.O. Box 80.115
> 3508 TC Utrecht
> Phone:  +3130 253 5773
> http://intamap.geo.uu.nl/~paul
> http://nl.linkedin.com/pub/paul-hiemstra/20/30b/770


-- 
*Manuel Spínola, Ph.D.*
Instituto Internacional en Conservación y Manejo de Vida Silvestre
Universidad Nacional
Apartado 1350-3000
Heredia
COSTA RICA
mspinola@una.ac.cr
mspinola10@gmail.com
Teléfono: (506) 2277-3598
Fax: (506) 2237-7036
Personal website: Lobito de río 
<https://sites.google.com/site/lobitoderio/>
Institutional website: ICOMVIS <http://www.icomvis.una.ac.cr/>

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