Changes between Version 2 and Version 3 of udg/ecoms/RPackage/examples/globalSelection


Ignore:
Timestamp:
Jun 17, 2014 1:50:49 PM (7 years ago)
Author:
juaco
Comment:

--

Legend:

Unmodified
Added
Removed
Modified
  • udg/ecoms/RPackage/examples/globalSelection

    v2 v3  
     1= Global domain selections
     2
     3For this example we will load the gridded observational dataset WFDEI (`dataset = "WFDEI"`). In particular, we will load the near-surface atmospheric pressure (`var = ps`) for all land areas globally in boreal winter (DJF, `season = c(12,1,2)`) for the year 2010 (`years = 2010`). Note that, for full spatial domain requests, arguments `lonLim` and `latLim` are set to `NULL` (the default, which is equivalent to just omitting both arguments).
     4
     5{{{
     6> ex.global <- loadECOMS(dataset = "WFDEI", var = "ps", lonLim = NULL, latLim = NULL, season = c(12,1,2), years = 2001)
     7[2014-06-17 13:18:14] Defining homogeneization parameters for variable "ps"
     8[2014-06-17 13:19:45] Defining geo-location parameters
     9[2014-06-17 13:19:45] Defining time selection parameters
     10[2014-06-17 13:19:58] Done
     11> print(object.size(ex.global), units = "Mb")
     12178 Mb
     13}}}
     14
     15Note that, unlike the [http://meteo.unican.es/ecoms-udg/RPackage/Examples previous examples], we have omitted the `leadMonth` and `members` arguments, as this is not a forecast dataset, but a gridded observational dataset lacking the initialization and ensemble dimensions. If any of this arguments is specified when loading `WFDEI` or any other non-forecast dataset, they will be simply ignored (originating a note on screen).
     16
     17{{{
     18> ps.mean <- apply(ex.global$Data, FUN = mean, MAR = c(1,2))
     19> x <- ex.global$xyCoords$x
     20> y <- ex.global$xyCoords$y
     21> # Requires library 'fields'. Please install if not present to reproduce the example
     22> library(fields)
     23> image.plot(x, y, ps.mean, asp = 1, main = "Mean DJF surface pressure 2001" )
     24}}}
     25
     26[[Image(image-20140617-134514.png)]]
     27
     28{{{#!comment
    129== Analysing model drift in the African Horn
    230