Changes between Version 32 and Version 33 of EcomsUdg/RPackage/Functions
 Timestamp:
 May 28, 2013 4:40:51 PM (9 years ago)
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EcomsUdg/RPackage/Functions
v32 v33 221 221 === ''__Description__'' 222 222 223 Loads hindcast/forecast data from the SPECSEUPORIAS THREDDS Data Server.223 Loads seasonal hindcast/forecast data from the SPECSEUPORIAS THREDDS Data Server. 224 224 225 225 … … 238 238 * `lonLim`: Vector of length = 2, with minimum and maximum longitude coordinates, in decimal degrees, of the bounding box selected. 239 239 * `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 yearcrossing 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 yearcrossing 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. 242 242 * `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. 243 243 … … 245 245 === ''__Details__'' 246 246 247 247 The 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 onemonth 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 yearcrossing 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). 248 248 249 249 {{{#!comment … … 278 278 279 279 280 === ''__Note__'' 281 282 A worked example describing a multimodel 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], 283 284 285 === ''__Examples__'' 286 287 An example of this function is provided in the [wiki:SpecsEuporias/RPackage/Examples Examples section] 288 289 290 291 280 === ''__Examples__'' 281 282 An example of this function is provided in the [wiki:SpecsEuporias/RPackage/Examples Examples section] 283 284 285 286