GMS:Multiplier Arrays for Parameters: Difference between revisions
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{{Infobox Calibration}} | {{Infobox Calibration}} | ||
HK and RCH parameters may be associated with a multiplier array. A | HK and RCH parameters may be associated with a multiplier array. A dataset is associated with a parameter zone and the starting parameter value is multiplied by the data set to define the spatial variation of the parameter throughout the zone. | ||
===Setting up Multiplier Arrays=== | ===Setting up Multiplier Arrays=== | ||
The multiplier | The multiplier dataset is associated with the parameter zone in the Parameters dialog by first turning on the '''Use multiplier arrays''' toggle, selecting either '''Single Array''' or '''Multiple Array''' from the pull-down list in the '''Multiplier''' column, and then selecting the data set using the button in the '''Dataset/Folder''' column. If the '''Single Array''' option is selected, a single dataset should be selected in the Dataset/Folder column. If the '''Multiple Array''' option is selected, an entire folder of datasets should be selected. The '''Multiple Array''' option is only available for stochastic modeling. | ||
If the '''Single Array''' option is selected the array for the parameter will be defined as the starting/mean value multiplied by the multiplication array for all cells associated with the parameter. Multiplier arrays are not available for parameters that use pilot points. | If the '''Single Array''' option is selected the array for the parameter will be defined as the starting/mean value multiplied by the multiplication array for all cells associated with the parameter. Multiplier arrays are not available for parameters that use pilot points. | ||
When the '''Multiple Arrays''' Option is selected, the number of stochastic model runs will be a function of how many | When the '''Multiple Arrays''' Option is selected, the number of stochastic model runs will be a function of how many datasets are in the folder selected by the user for the multipliers. | ||
[[Image:multiplier_array_param_dialog.gif|frame|center|320px]] | [[Image:multiplier_array_param_dialog.gif|frame|center|320px]] | ||
===Guassian Field Based Monte Carlo Simulations=== | ===Guassian Field Based Monte Carlo Simulations=== | ||
The '''Multiple Array''' option for user-defined multiplier arrays can be used in combination with the new [[GMS:Gaussian Field Generator|Gaussian Field Generator]] to perform a Monte Carlo simulation. This is accomplished by first generating a set of Gaussian fields using the FIELDGEN code and then associating the resulting folder of | The '''Multiple Array''' option for user-defined multiplier arrays can be used in combination with the new [[GMS:Gaussian Field Generator|Gaussian Field Generator]] to perform a Monte Carlo simulation. This is accomplished by first generating a set of Gaussian fields using the FIELDGEN code and then associating the resulting folder of datasets with a parameter as described above. A stochastic simulation can then be performed using the Parameter Randomization method. For each model instance, GMS loads a new instance of the multiplier array into the model input. A default parameter value of 1.0 is generally recommended in such instances. | ||
{{Navbox GMS}} | {{Navbox GMS}} | ||
[[Category:Parameters]] | [[Category:Parameters]] | ||
