howtos:toolcoding:feedback_views
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howtos:toolcoding:feedback_views [2011/06/21 15:56] shona.weldon |
howtos:toolcoding:feedback_views [2017/04/14 16:32] (current) marcus.williams |
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| ====== Feedback views ====== | ====== Feedback views ====== | ||
| - | Feed back views are a way to run part of the model in a loop adjusting model inputs for each iteration and providing back to the view of the model outputs required. The reasons for using feedback views including handling model feedback links, and trying to get model outputs to track on some know data. There are many other ways of using feed back too. | + | Feed back views are a way to run part of the model in a loop adjusting model inputs for each iteration and providing back to the view of the model outputs required. The reasons for using feedback views include handling model feedback links, and trying to get model outputs to track on some know data. There are many other ways of using feed back too. |
| There are a few built in tool variables that are available to the view writer to track the feedback process and terminate the loop when ready they are: | There are a few built in tool variables that are available to the view writer to track the feedback process and terminate the loop when ready they are: | ||
| * **$fbViewIteration** - the iteration number of the loop | * **$fbViewIteration** - the iteration number of the loop | ||
| - | * **$fbViewMaxIters** - the maximum number of iterations the user who starts the view requested | + | * **$fbViewMaxIters** - the maximum number of iterations requested by the user |
| - | * **$fbViewTolerance** - the convergence tolerance the user who starts the view requested | + | * **$fbViewTolerance** - the convergence tolerance requested by the user |
| - | You can declare regular **local** variables however be aware that they are wiped out at the start of each iteration. | + | Note: |
| - | + | * You can declare regular **local** variables in a feedback view, however be aware that local variables are wiped out at the start of each iteration. If you want to reuse you local variables for each iteration you need to declare it as **keep** variable, which remain available to the view for every iteration. Usually you create keep variables on the first iteration inside an "if clause" as seen below: | |
| - | You can declare regular **keep** variables which remain available for every iteration. Usually you create them on the first iteration inside an "if clause" like this: | + | |
| <code> | <code> | ||
| keep A[] | keep A[] | ||
| + | |||
| if ($fbViewIteration) | if ($fbViewIteration) | ||
| A[] = create(...) | A[] = create(...) | ||
| Line 23: | Line 23: | ||
| ==== Example feedback view files ==== | ==== Example feedback view files ==== | ||
| - | Here is an example of the .v and .t files for a simple feedback view that modifies a model input until the model output matches some given "golden" value in the last time slice. | + | Here is the code for the .v and .t files for a simple feedback view that modifies a model input until the model output matches some given "golden" value in the last time slice. |
| viewName.v: | viewName.v: | ||
| Line 86: | Line 86: | ||
| if ($numNotConv == 0) or ($fbViewIteration == $fbViewMaxIters) | if ($numNotConv == 0) or ($fbViewIteration == $fbViewMaxIters) | ||
| - | if ( | ||
| mumble (" numNotConv = ", $numNotConv, " at iteration ",$fbViewIteration, " stopping due to ") | mumble (" numNotConv = ", $numNotConv, " at iteration ",$fbViewIteration, " stopping due to ") | ||
| if ($numNotConv == 0) | if ($numNotConv == 0) | ||
| Line 101: | Line 100: | ||
| </file> | </file> | ||
| + | ==== Use of quit () ==== | ||
| + | |||
| + | ''quit (1)'' exits the current iteration. | ||
| + | |||
| + | ''quit (0)'' exits the entire feedback view. | ||
| ==== Declaring in views.samm ==== | ==== Declaring in views.samm ==== | ||
howtos/toolcoding/feedback_views.1308671787.txt.gz · Last modified: 2011/06/21 15:56 by shona.weldon
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