Changes between Version 7 and Version 8 of udg/ecoms/RPackage


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Timestamp:
May 22, 2013 1:25:08 PM (8 years ago)
Author:
juaco
Comment:

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  • udg/ecoms/RPackage

    v7 v8  
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    3 == Overview of the R package under development ==
     3= Overview of the R package under development
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    10 == Vocabulary definition ==
     10== Vocabulary definition
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    1212In order to set a common framework with a precise definition of the variables, the R package is based on the use of a vocabulary. Essentially, the vocabulary is simply a table containing the standard names of a number of variables commonly used in impact studies and downscaling applications. The naming conventions and the units are based on the standard name table provided by the [http://cf-pcmdi.llnl.gov/documents/cf-standard-names/standard-name-table/16/cf-standard-name-table.html/ NetCDF Climate and Forecast Metadata Convention]. The vocabulary consists of a table with:
     
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    36 == Dictionary ==
     36== Dictionary
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    3838The dictionary is a table whose aim is twofold:
     
    4545 * `short_name`: this is the name with which the original variable has been coded in the dataset
    4646 * `time_step`: the time interval between consecutive times in the time dimension axis (in hours)
    47  * `lower_time_bound`: lower time bound of the variable
    48  * `upper_time_bound`: upper time bound of the variable. For instance, if a variable has identical lower and upper time bounds, it means that it is instantaneous.
     47 * `lower_time_bound`: lower time bound of the variable. This should be in hours.
     48 * `upper_time_bound`: upper time bound of the variable. This should be in hours. For instance, if a variable has identical lower and upper time bounds, it means that it is instantaneous.
    4949 * `aggr_fun`: time aggregation function. Type of aggregation function applied to the variable between the lower and upper time bound.
    5050 * `offset`: constant summed to the original variable for units conversion (e.g.: offset = -273.15 for conversion from Kelvin to Celsius)