Changes between Version 32 and Version 33 of EcomsUdg/RPackage/Functions


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Timestamp:
May 28, 2013 4:40:51 PM (8 years ago)
Author:
juaco
Comment:

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  • EcomsUdg/RPackage/Functions

    v32 v33  
    221221=== ''__Description__''
    222222
    223 Loads hindcast/forecast data from the SPECS-EUPORIAS THREDDS Data Server.
     223Loads seasonal hindcast/forecast data from the SPECS-EUPORIAS THREDDS Data Server.
    224224
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    238238* `lonLim`: Vector of length = 2, with minimum and maximum longitude coordinates, in decimal degrees, of the bounding box selected.
    239239* `latLim`: Vector of length = 2, with minimum and maximum latitude coordinates, in decimal degrees, of the bounding box selected.
    240 * `season`: A vector of integers specifying the desired season (in months, January=1 ...). Options include one to several months. If `NULL` (the default), the function will return a whole year forecast from January to December. For instance, `period = c(12,1,2)` will retrieve the forecast for the standard boreal winter (DJF), `period = 6:8` for summer (JJA) and so on.
    241 * `years`: Optional vector of years to select. Default to all available years. Note that in the case of a year-crossing season for a particular year period (e.g. winter DJF, `season = c(12,1,2)` and `years = 1981:2000`), by convention the first season returned will be DJF 1980/81, if available (otherwise a warning message is given).
     240* `season`: A vector of integers specifying the desired season (in months, January=1 ...). Options include one to several months. If `NULL` (the default), the function will return all possible months given the `leadMonth`. For instance, `period = c(12,1,2)` will retrieve the forecast for the standard boreal winter (DJF), `period = 6:8` for summer (JJA) and so on. See details.
     241* `years`: Optional vector of years to select. Default to all available years. Note that in the case of a year-crossing season for a particular year period (e.g. winter DJF, `season = c(12,1,2)` and `years = 1981:2000`), by convention the first season returned will be DJF 1980/81, if available (otherwise a warning message is given). See details.
    242242* `leadMonth`: Lead month forecast time corresponding to the first month of the specified season. Note that `leadMonth = 1` for `season = 1` (January) corresponds to the December initialization forecasts. The effect of the lead time in the forecast for a particular season can be analyzed by just changing this parameter.
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    245245=== ''__Details__''
    246246
    247 
     247The function has been implemented to access seasonal slices (as determined by the `season` argument. Seasons can be defined in several ways: A single month (e.g. `season = 1` for January), a standard season (e.g. `season=c(1,2,3)` for JFM, or `season=c(12,1,2)` for DJF), or any period of consecutive months (e.g. `season=c(1,2,3,4,5,6)`, for the first half of the year). Seasons are returned for a given year period (defined by the `years` argument, e.g. `years = 1981:2000`) with a homogeneous forecast lead time (as given by the `leadMonth` argument; e.g. `leadMonth = 1` for one-month lead time) with respect to the first month of the selected season. For example, `season=c(1,2,3)` for `years = 1995:2000` and `leadMonth = 1` will return the following series: JFM 1995 (from the December 1994 runtime forecast), ..., JFM 2000 (from the December 1999 runtime forecast). Note that it is also possible to work with year-crossing seasons, such as DJF. In this case,  `season=c(12,1,2)` for `years = 1995:2000` and  `leadMonth = 1` will return the following series: DJF 1994/1995 (from the November 1994 runtime forecast), ..., DJF 1999/2000 (from the November 1999 runtime forecast).
    248248
    249249{{{#!comment
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    278278
    279279
    280 === ''__Note__''
    281 
    282 A worked example describing a multi-model selection of a dataset is presented in the tutorial, which can be downloaded [https://www.meteo.unican.es/trac/meteo/attachment/wiki/SpecsEuporias/DataPortal_Tutorial.pdf here],
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    285 === ''__Examples__''
    286 
    287 An example of this function is provided in the [wiki:SpecsEuporias/RPackage/Examples Examples section]
    288 
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    291 
     280=== ''__Examples__''
     281
     282An example of this function is provided in the [wiki:SpecsEuporias/RPackage/Examples Examples section]
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