Description
Interpolation function.
Linear interpolation y=f(x) given a list of points (x,y).
#include <ChFunctionInterp.h>
Public Member Functions | |
| ChFunctionInterp (const ChFunctionInterp &other) | |
| virtual ChFunctionInterp * | Clone () const override |
| "Virtual" copy constructor (covariant return type). | |
| virtual Type | GetType () const override |
| Return the unique function type identifier. | |
| virtual double | GetVal (double x) const override |
| Return the function output for input x. More... | |
| virtual double | GetDer (double x) const override |
| Return the first derivative of the function. More... | |
| virtual double | GetDer2 (double x) const override |
| Return the second derivative of the function. More... | |
| void | AddPoint (double x, double y, bool overwrite_if_existing=false) |
| Add a point to the table. More... | |
| void | Reset () |
| const std::map< double, double > & | GetTable () |
| Retrieve the underlying table of points. | |
| double | GetStart () const |
| Return the smallest value of x in the table. | |
| double | GetEnd () const |
| Return the biggest value of x in the table. | |
| double | GetMax () const |
| Return the maximum function value in the table. | |
| double | GetMin () const |
| Return the minimum function value in the table. | |
| void | SetExtrapolate (bool extrapolate) |
| Enable linear extrapolation. More... | |
| virtual void | ArchiveOut (ChArchiveOut &archive_out) override |
| Method to allow serialization of transient data to archives. | |
| virtual void | ArchiveIn (ChArchiveIn &archive_in) override |
| Method to allow de-serialization of transient data from archives. | |
 Public Member Functions inherited from chrono::ChFunction | |
| ChFunction (const ChFunction &other) | |
| virtual double | GetDer3 (double x) const |
| Return the third derivative of the function. More... | |
| virtual double | GetDerN (double x, int der_order) const |
| Return the Nth derivative of the function (up to 3rd derivative). More... | |
| virtual double | GetWeight (double x) const |
| Return the weight of the function. More... | |
| virtual void | Update (double x) |
| Update the function at the provided value of its argument. | |
| virtual double | GetMax (double xmin, double xmax, double sampling_step, int der_order) const |
| Estimate the maximum of the function (or its der_order derivative) in the range [xmin, xmax]. More... | |
| virtual double | GetMin (double xmin, double xmax, double sampling_step, int der_order) const |
| Estimate the minimum of the function (or its der_order derivative) in the range [xmin, xmax]. More... | |
| virtual double | GetMean (double xmin, double xmax, double sampling_step, int der_order) const |
| Estimate the mean of the function (or its der_order derivative) in the range [xmin, xmax]. More... | |
| virtual double | GetSquaredMean (double xmin, double xmax, double sampling_step, int der_order) const |
| Estimate the squared mean of the function (or its der_order derivative) in the range [xmin, xmax]. More... | |
| virtual double | GetIntegral (double xmin, double xmax, double sampling_step, int der_order) const |
| Estimate the integral of the function (or its der_order derivative) over the range [xmin, xmax]. More... | |
| virtual double | GetPositiveAccelerationCoeff () const |
| Compute the positive acceleration coefficient. More... | |
| virtual double | GetNegativeAccelerationCoeff () const |
| Compute the negative acceleration coefficient. More... | |
| virtual double | GetVelocityCoefficient () const |
| Compute the velocity coefficient. More... | |
| virtual void | OutputToASCIIFile (std::ostream &file, double xmin, double xmax, int samples, char delimiter) |
| Store X-Y pairs to an ASCII File. More... | |
| virtual ChMatrixDynamic | SampleUpToDerN (double xmin, double xmax, double step, int derN=0) |
| Sample function on given interval [xmin, xmax], up to derN derivative (0 being the function ouput itself). More... | |
| double | operator() (double arg) const |
| Alias operator of the GetVal function. | |
Additional Inherited Members | |
| Public Types inherited from chrono::ChFunction | |
| enum | Type { BSPLINE, CONSTANT, CONSTACC, CONSTJERK, CUSTOM, CYCLOIDAL, DERIVATIVE, FILLET3, INTEGRAL, INTERP, LAMBDA, MIRROR, OPERATOR, POLY, POLY23, POLY345, RAMP, REPEAT, SEQUENCE, SINE, SINE_STEP } |
| Enumeration of function types. | |
Member Function Documentation
◆ AddPoint()
| void chrono::ChFunctionInterp::AddPoint | ( | double | x, |
| double | y, | ||
| bool | overwrite_if_existing = false |
||
| ) |
Add a point to the table.
By default, adding a point with an x value that already exists in the table will lead to an exception. If overwrite_if_existing is set to true, the existing point will be overwritten instead.
◆ GetDer()
|
overridevirtual |
Return the first derivative of the function.
Default implementation computes a numerical differentiation. Inherited classes may override this method with a more efficient implementation (e.g. analytical solution).
Reimplemented from chrono::ChFunction.
◆ GetDer2()
|
overridevirtual |
Return the second derivative of the function.
Default implementation computes a numerical differentiation. Inherited classes may override this method with a more efficient implementation (e.g. analytical solution).
Reimplemented from chrono::ChFunction.
◆ GetVal()
|
overridevirtual |
Return the function output for input x.
Must be overridden by specialized classes.
Implements chrono::ChFunction.
◆ SetExtrapolate()
|
inline |
Enable linear extrapolation.
If enabled, the function will return linear extrapolation for x values outside the domain. while the first derivative will be kept equal to the derivative of the nearest two points. Second derivative in any case will be computed numerically based on first derivative.
The documentation for this class was generated from the following files:
- /builds/uwsbel/chrono/src/chrono/functions/ChFunctionInterp.h
- /builds/uwsbel/chrono/src/chrono/functions/ChFunctionInterp.cpp
