Template:Dataset Calculator

Dataset Calculator

The Dataset Calculator tool will perform calculations on one or more dataset data and activity. The tool will produce a new dataset with the resulting values and activity of those datasets according to the provided mathematical expression

Input Parameters

• Grid Source Selection – The source grid of any datasets to work with.
• Data Location Selection – The allowed location of data in datasets: either on points or cells of the source grid.
• Table –
  • Dataset – The selected dataset
  • Variable Name – The name to be used to refer to the chosen dataset within the provided expression.
  • Time Step – The chosen timestep from which to use data from this dataset. Or select all timesteps to use all values within this dataset.
• Mathematical Expression – The expression to be evaluated with the chosen datasets

Output Parameters

• Output Dataset Name – the name of the new dataset to fill with the resulting values from the expression.

The output will be a new dataset on the chosen grid with values and activity according to the expression and chosen datasets.

Current Location in toolbox

Datasets/ Dataset Calculator

Restrictions/Rules

The values will be the result of the expression being performed on each set of values of the datasets at each time step. Datasets with point and cell values cannot be mixed in the dataset calculator.

• If no dataset being used in a calculation has activity, the resulting dataset will also not have activity. (See example #1 in the table below)
• In calculations with multiple datasets with one timestep selected, the resulting time step will be 0.0. (See example #4)
• If there is a combination of different selections for time steps and there is at least one dataset with “all time steps” selected, the resulting dataset’s time steps will be that dataset’s time steps. (see example #5)
  • In any such calculations, the calculator will use the single corresponding values array from any datasets with a single time step selected for every corresponding set of values in any datasets with “all time steps” selected. time step in the multiple time step selections.
• All datasets where “all time steps” has been selected must have the same time steps. (See example #9)
• If there is a combination of activity on cells and points between the datasets being used in a calculation, before performing calculations for activity, the calculator will find the point activity from the given cell activity and use that in the activity calculations. (See example #26)