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Get index of a state element of an operating point specification or operating point

The `States`

property of an operating
point specification is an array that contains trimming specifications
for each model state. When defining a mapping function for customized
trimming of Simulink^{®} models, `getStateIndex`

lets
you obtain the index of a state specification based on the corresponding
block path or state name.

When trimming Simulink models using optimization-based search, some applications require additional flexibility in defining the optimization search parameters. For such systems, you can specify custom constraints and a custom objective function. For complex models, you can define a mapping that selects a subset of the model states, inputs, and outputs to pass to the custom constraint and objective functions. For more information, see Compute Operating Points Using Custom Constraints and Objective Functions.

`index = getStateIndex(op,name)`

`index = getStateIndex(op,name,element)`