R help - Apr 2014 - Values cells

Hi folks,

I’m using the raster package.

I need to get the min and max values between the cells of a raster,
something like this: [min, max]. How?



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Well, if you are using the print method on a raster object  what do you get
then?

Try this:
> library(raster)
Loading required package: sp
>      logo <- raster(system.file("external/rlogo.grd",
package="raster"))
> print(logo)
class       : RasterLayer 
band        : 1  (of  3  bands)
dimensions  : 77, 101, 7777  (nrow, ncol, ncell)
resolution  : 1, 1  (x, y)
extent      : 0, 101, 0, 77  (xmin, xmax, ymin, ymax)
coord. ref. : +proj=merc 
data source : c:\Programmer\R\R-3.0.2\library\raster\external\rlogo.grd 
names       : red 
values      : 0, 255  (min, max)

See the values entry. Since this is a color image there are 3 bands. What you
see above is for the first band ("red").

Going from 0 to 255 for red is no surprise. You will probably see the same for
green and blue as well.

What are you really looking for?

Yours sincerely / Med venlig hilsen


Frede Aakmann T?gersen
Specialist, M.Sc., Ph.D.
Plant Performance & Modeling

Technology & Service Solutions
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> -----Original Message-----
> From: r-help-bounces at r-project.org [mailto:r-help-bounces at
r-project.org]
> On Behalf Of Alexsandro C?ndido de Oliveira Silva
> Sent: 16. april 2014 20:07
> To: r-help at r-project.org
> Subject: [R] Values cells
> 
> Hi folks,
> 
> I'm using the raster package.
> 
> I need to get the min and max values between the cells of a raster,
> something like this: [min, max]. How?
> 
> 
> 
> ---
> Este email est? limpo de v?rus e malwares porque a prote??o do avast!
> Antiv?rus est? ativa.
> 
> 
> 	[[alternative HTML version deleted]]

I'm pretty sure this is described and not hard to find in the raster
package documentation, which you can download from the CRAN package page.
In addition, r-sig-geo is generally the best place to ask question related
to R's 'geo' packages (which includes raster).

-Don

-- 
Don MacQueen

Lawrence Livermore National Laboratory
7000 East Ave., L-627
Livermore, CA 94550
925-423-1062





On 4/16/14 11:06 AM, "Alexsandro C?ndido de Oliveira Silva"
<acos at dpi.inpe.br> wrote:
>Hi folks,
>
>I?m using the raster package.
>
>I need to get the min and max values between the cells of a raster,
>something like this: [min, max]. How?
>
>
>
>---
>Este email est? limpo de v?rus e malwares porque a prote??o do avast!
>Antiv?rus est? ativa.
>
>
>	[[alternative HTML version deleted]]
>