SineModel = class SineModel(NonLinearModel) |
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SineModel(copy=None, phase=False, **kwargs)
Sinusoidal Model.
Two variants are implemented.
1. By default it is the weighted sum of sine and cosine of the same frequency:
f( x:p ) = p_1 * cos( 2 * π * p_0 * x ) + p_2 * sin( 2 * π * p_0 * x )
where
p_0 = frequency
p_1 = amplitude cosine and
p_2 = amplitude sine.
As always x = input.
The parameters are initialized at [1.0, 1.0, 1.0]. It is a non-linear model.
2. If phase == True, the sinusoidal model has an explicit phase:
f( x:p ) = p_0 * sin( 2 * π * p_1 * x + p_2 )
where
p_0 = amplitude
p_1 = frequency
p_2 = phase.
The parameters are initialized as [1.0, 1.0, 0.0].
Examples
--------
>>> sine = SineModel( )
>>> print( sine.npchain )
3
>>> pars = [0.1, 0.0, 1.0]
>>> sine.parameters = pars
>>> print( sine( numpy.arange( 11, dtype=float ) ) ) # One sine period
>>> pars = [0.1, 1.0, 0.0]
>>> sine.parameters = pars
>>> print( sine( numpy.arange( 11, dtype=float ) ) ) # One cosine period
Attributes
----------
phase : bool (False)
False : original 2 amplitudes model
True : phase model
Attributes from Model
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npchain, parameters, stdevs, xUnit, yUnit
Attributes from FixedModel
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npmax, fixed, parlist, mlist
Attributes from BaseModel
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npbase, ndim, priors, posIndex, nonZero,
tiny, deltaP, parNames |
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- Method resolution order:
- SineModel
- NonLinearModel
- Model
- FixedModel
- BaseModel
- builtins.object
Constructor:
- SineModel( copy=None, phase=False, **kwargs )
- Sinusiodal model.
Number of parameters is 3.
Parameters
----------
phase : bool
if True, construct phase variant.
copy : SineModel
model to copy
fixed : dictionary of {int:float}
int list if parameters to fix permanently. Default None.
float list of values for the fixed parameters.
Attribute fixed can only be set in the constructor.
Methods defined here:
- baseDerivative( xdata, params )
- Returns the derivative of f to x (df/dx) at the input values.
Parameters
----------
xdata : array_like
values at which to calculate the result
params : array_like
values for the parameters.
- baseName()
- Returns a string representation of the model.
- baseParameterUnit( k )
- Return the unit of a parameter.
Parameters
----------
k : int
the kth parameter.
- basePartial( xdata, params, parlist=None )
- Returns the partials at the input value.
Parameters
----------
xdata : array_like
values at which to calculate the result
params : array_like
values for the parameters.
parlist : array_like
list of indices active parameters (or None for all)
- baseResult( xdata, params )
- Returns the result of the model function.
Parameters
----------
xdata : array_like
values at which to calculate the result
params : array_like
values for the parameters.
- copy()
- Copy method.
- phaseDerivative( xdata, params )
- Returns the derivative of f to x (df/dx) at the input values.
Parameters
----------
xdata : array_like
values at which to calculate the result
params : array_like
values for the parameters.
- phaseName()
- Returns a string representation of the model.
- phaseParameterUnit( k )
- Return the unit of a parameter.
Parameters
----------
k : int
the kth parameter.
- phasePartial( xdata, params, parlist=None )
- Returns the partials at the input value.
Parameters
----------
xdata : array_like
values at which to calculate the result
params : array_like
values for the parameters.
parlist : array_like
list of indices active parameters (or None for all)
- phaseResult( xdata, params )
- Returns the result of the model function.
Parameters
----------
xdata : array_like
values at which to calculate the result
params : array_like
values for the parameters.
Methods inherited from NonLinearModel:
Methods inherited from Model:
Overloaded operators and aliases
Other methods
- addModel( model )
- appendModel( model, operation )
- assignDF1( partial, i, dpi )
- assignDF2( partial, i, dpi )
- chainLength()
- correctParameters( params )
- derivative( xdata, param, useNum=False )
- divideModel( model )
- domain2Unit( dvalue, kpar=None )
- getIntegralUnit()
- getLimits()
- getLinearIndex()
- getNumberOfParameters()
- getParameterName( k )
- getParameterUnit( k )
- getPrior( k )
- hasLimits( fitindex=None )
- hasPriors( isBound=True )
- isDynamic()
- isNullModel()
- isolateModel( k )
- multiplyModel( model )
- nextPrior()
- numDerivative( xdata, param )
- numPartial( xdata, param )
- operate( res, pars, next )
- partialDomain2Unit( dvalue )
- pipeModel( model )
- pipe_0( dGd, dHdG)
- pipe_1( dGd, dHdG)
- pipe_2( dGd, dHdG)
- pipe_3( dGd, dHdG)
- pipe_4( dGdx, dHdG)
- pipe_5( dGdx, dHdG)
- pipe_6( dGdx, dHdG)
- pipe_7( dGdx, dHdG)
- pipe_8( dGdx, dHdG)
- pipe_9( dGdx, dHdG)
- result( xdata, param=None )
- selectPipe( ndim, ninter, ndout )
- setLimits( lowLimits=None, highLimits=None )
- setPrior( k, prior=None, **kwargs )
- shortName()
- strictNumericDerivative( xdata, param )
- strictNumericPartial( xdata, params, parlist=None )
- subtractModel( model )
- testPartial( xdata, params, silent=True )
- unit2Domain( uvalue, kpar=None )
Methods inherited from FixedModel:
Methods inherited from BaseModel:
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