# Changes between Version 17 and Version 18 of EcomsUdg/RPackage/Functions

Ignore:
Timestamp:
May 18, 2013 2:32:07 PM (8 years ago)
Comment:

--

### Legend:

Unmodified
 v17 ''__Description'' Loads selected dimensional slices of a NcML dataset. The function is intended to deal with gridded data (interpolated surfaces, reanalysis ...) Loads selected dimensional slices of a NcML dataset. The function is intended to deal with gridded data (interpolated surfaces, reanalysis, RCMs/GCMs ...) ''__Usage'' * var: Character string indicating the variable to load. * standard.vars: Logical. Default to FALSE. If TRUE a dictionary must be available (see Details) * lonLim: Vector of length = 2, with minimum and maximum longitude coordinates, in decimal degrees, of the bounding box selected. * latLim: Vector of length = 2, with minimum and maximum latitude coordinates, in decimal degrees, of the bounding box selected. * level: Vertical level, if defined for the variable. * startDate: Optional character string in the form "Year-month-day" (e.g. "1950-01-01") indicating the starting day of the time series to retrieve. Default to first record available. * endDate: Optional character string in the form "Year-month-day" (e.g. "2000-12-31") indicating the last day of the time series to retrieve. Default to last record available. * lonLim: Vector of length = 2, with minimum and maximum longitude coordinates, in decimal degrees, of the bounding box selected. Alternatively, point selection is performed indicating the longitude as a single numeric value. If NULL (the default), the whole longitudinal range of the dataset is selected. See details. * latLim: Vector of length = 2, with minimum and maximum latitude coordinates, in decimal degrees, of the bounding box selected. Alternatively, point selection is performed indicating the latitude as a single numeric value. If NULL (the default), the whole latitudinal range of the dataset is selected. See details. * level: Vertical level, if defined for the variable. See details * startDate: Optional character string in the form "Year-month-day" (e.g. "1950-01-01") indicating the starting day of the time series to retrieve. Default to first record available. See details. * endDate: Optional character string in the form "Year-month-day" (e.g. "2000-12-31") indicating the last day of the time series to retrieve. Default to last record available. See details. ''__Details'' The function can select the whole spatial domain covered by the dataset, spatial windows defined by the minimum and maximum corner coordinates, and single grid-cell values. In the last two cases, the function operates by finding the closest grid-points to the coordinates introduced. For variables with different vertical levels, only defined level values will be allowed, otherwise getting an error. The function does not look for the closest level to the value introduced, in order to avoid confusions. The function datasetInventory is useful for finding out the valid level values defined for a particular variable. In the case of time slice selection in sub-daily datasets, the function will retrieve all records belonging to the days indicated. For instance, if endDate=2000-12-31 and the dataset has a time resolution of 6h, the last date returned will be ''"2000-12-31 18:00:00"''. ''__Value''