solutionfromID
Class: FunctionApproximation.LUTSolution
Namespace: FunctionApproximation
Access a solution found during the approximation process
Syntax
other_solution = solutionfromID(solution,id)
Description
returns the solution associated with the other_solution
= solutionfromID(solution
,id
)FunctionApproximation.LUTSolution
object, solution
,
with the ID specified by id
.
Input Arguments
The solution object containing the solution you want to explore, specified
as a FunctionApproximation.LUTSolution
object.
ID of the solution that you want to explore, specified as a scalar integer.
Data Types: double
Output Arguments
FunctionApproximation.LUTSolution
object associated
with the specified ID.
Examples
This example shows how to use the solutionfromID
method of the FunctionApproximation.LUTSolution
object to examine other approximation solutions.
Create a FunctionApproximation.Problem
object defining a math function to approximate. Then use the solve
method to get a FunctionApproximation.LUTSolution
object.
problem = FunctionApproximation.Problem('sin')
problem = 1×1 FunctionApproximation.Problem with properties: FunctionToApproximate: @(x)sin(x) NumberOfInputs: 1 InputTypes: "numerictype(0,16,13)" InputLowerBounds: 0 InputUpperBounds: 6.2832 OutputType: "numerictype(1,16,14)" Options: [1×1 FunctionApproximation.Options]
solution = solve(problem)
Searching for fixed-point solutions. | ID | Memory (bits) | Feasible | Table Size | Breakpoints WLs | TableData WL | BreakpointSpecification | Error(Max,Current) | | 0 | 64 | 0 | 2 | 16 | 16 | EvenSpacing | 7.812500e-03, 1.000000e+00 | | 1 | 784 | 1 | 47 | 16 | 16 | EvenSpacing | 7.812500e-03, 5.388912e-03 | | 2 | 768 | 1 | 46 | 16 | 16 | EvenSpacing | 7.812500e-03, 4.534419e-03 | | 3 | 608 | 1 | 36 | 16 | 16 | EvenSpacing | 7.812500e-03, 4.089765e-03 | | 4 | 592 | 1 | 35 | 16 | 16 | EvenSpacing | 7.812500e-03, 4.272461e-03 | | 5 | 416 | 1 | 24 | 16 | 16 | EvenSpacing | 7.812500e-03, 6.201693e-03 | | 6 | 400 | 1 | 23 | 16 | 16 | EvenSpacing | 7.812500e-03, 6.958889e-03 | | 7 | 224 | 0 | 12 | 16 | 16 | EvenSpacing | 7.812500e-03, 4.013411e-02 | | 8 | 304 | 0 | 17 | 16 | 16 | EvenSpacing | 7.812500e-03, 1.887217e-02 | | 9 | 352 | 1 | 20 | 16 | 16 | EvenSpacing | 7.812500e-03, 7.807773e-03 | | 10 | 320 | 0 | 18 | 16 | 16 | EvenSpacing | 7.812500e-03, 1.695679e-02 | | 11 | 336 | 1 | 19 | 16 | 16 | EvenSpacing | 7.812500e-03, 7.810061e-03 | | 12 | 64 | 0 | 2 | 16 | 16 | EvenPow2Spacing | 7.812500e-03, 1.315166e+00 | | 13 | 576 | 1 | 18 | 16 | 16 | ExplicitValues | 7.812500e-03, 7.803448e-03 | | 14 | 512 | 0 | 16 | 16 | 16 | ExplicitValues | 7.812500e-03, 1.190175e-02 | | 15 | 576 | 1 | 18 | 16 | 16 | ExplicitValues | 7.812500e-03, 7.803448e-03 | Best Solution | ID | Memory (bits) | Feasible | Table Size | Breakpoints WLs | TableData WL | BreakpointSpecification | Error(Max,Current) | | 11 | 336 | 1 | 19 | 16 | 16 | EvenSpacing | 7.812500e-03, 7.810061e-03 |
solution = 1×1 FunctionApproximation.LUTSolution with properties: ID: 11 Feasible: "true"
Display all feasible solutions found during the approximation process.
displayfeasiblesolutions(solution)
| ID | Memory (bits) | Feasible | Table Size | Breakpoints WLs | TableData WL | BreakpointSpecification | Error(Max,Current) | | 1 | 784 | 1 | 47 | 16 | 16 | EvenSpacing | 7.812500e-03, 5.388912e-03 | | 2 | 768 | 1 | 46 | 16 | 16 | EvenSpacing | 7.812500e-03, 4.534419e-03 | | 3 | 608 | 1 | 36 | 16 | 16 | EvenSpacing | 7.812500e-03, 4.089765e-03 | | 4 | 592 | 1 | 35 | 16 | 16 | EvenSpacing | 7.812500e-03, 4.272461e-03 | | 5 | 416 | 1 | 24 | 16 | 16 | EvenSpacing | 7.812500e-03, 6.201693e-03 | | 6 | 400 | 1 | 23 | 16 | 16 | EvenSpacing | 7.812500e-03, 6.958889e-03 | | 9 | 352 | 1 | 20 | 16 | 16 | EvenSpacing | 7.812500e-03, 7.807773e-03 | | 11 | 336 | 1 | 19 | 16 | 16 | EvenSpacing | 7.812500e-03, 7.810061e-03 | | 13 | 576 | 1 | 18 | 16 | 16 | ExplicitValues | 7.812500e-03, 7.803448e-03 | | 15 | 576 | 1 | 18 | 16 | 16 | ExplicitValues | 7.812500e-03, 7.803448e-03 | Best Solution | ID | Memory (bits) | Feasible | Table Size | Breakpoints WLs | TableData WL | BreakpointSpecification | Error(Max,Current) | | 11 | 336 | 1 | 19 | 16 | 16 | EvenSpacing | 7.812500e-03, 7.810061e-03 |
Solution with ID 5 is not listed as a feasible solution in the table. Explore this solution to see why it is not feasible.
solution5 = solutionfromID(solution, 5)
solution5 = 1×1 FunctionApproximation.LUTSolution with properties: ID: 5 Feasible: "true"
Compare the numerical behavior of the solution with ID 5.
compare(solution5)
ans = struct with fields:
Breakpoints: [51473×1 double]
Original: [51473×1 double]
Approximate: [51473×1 double]
You can see from the plot that the solution does not meet the required tolerances.
Version History
Introduced in R2018a
See Also
Apps
Classes
FunctionApproximation.Problem
|FunctionApproximation.Options
|FunctionApproximation.LUTMemoryUsageCalculator
|FunctionApproximation.LUTSolution
Functions
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