So what is in the three bands?
Paul
On 11/07/2010 02:06 PM, Manuel Spínola wrote:
> 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
>>>>>> mspin...@una.ac.cr
>>>>>> mspinol...@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
>>> mspin...@una.ac.cr
>>> mspinol...@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
> mspin...@una.ac.cr
> mspinol...@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
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