qubx.fit.BaseFitter

Class BaseFitter

object --+ | BaseFitter

Defines the interface of a fitter object; fitters need not subclass, but they must behave like it.

Instance Methods

__call__(self, curve, param_vals, xx, yy, vvv=[], ww=None, on_iter=<__builtin__.function object>, on_status=<__builtin__.function object>)
Returns improved param_vals, which minimize the sum-squared-residual between yy and curve.eval(param_vals, xx, vvv). source code

__init__(self, max_iter=200, toler=1e-10)
x.__init__(...) initializes x; see help(type(x)) for signature

source code

stop(self, cancel_exception)
By default fitting is stopped by KeyboardInterrupt; this method can do additional stuff, and can call cancel_exception() to inhibit the default behavior.

source code

Inherited from object: __delattr__, __format__, __getattribute__, __hash__, __new__, __reduce__, __reduce_ex__, __repr__, __setattr__, __sizeof__, __str__, __subclasshook__

Instance Variables

[hide private]

max_iter
maximum iterations

name
index (string) in Fitters

toler
how close to get before stopping

Properties

[hide private]

Inherited from object: __class__

call(self, curve, param_vals, xx, yy, vvv=`[]`, ww=None, on_iter=<builtin.function object>, on_status=<builtin.function object>)
(Call operator)

source code

Returns improved param_vals, which minimize the sum-squared-residual between yy and curve.eval(param_vals, xx, vvv).

Parameters:

curve - BaseCurve
param_vals - list of float corresponding to curve.params
xx - numpy.array(dtype='float32') of x coords
yy - numpy.array(dtype='float32') of y coords
vvv - list of numpy.array(dtype='float32') of additional named data series, available to curve expr
ww - numpy.array(dtype='float32') of weighting factors, per sample, or None
on_iter - each improvement in param_vals, calls on_iter(param_vals, iter) -> True to continue iterating
on_status - text output callback: on_status(msg)

Returns:

(fitted param_vals, sum_sqr_residual, iterations, fit curve array)

init(self, max_iter=200, toler=1e-10)
(Constructor)

source code

x.__init__(...) initializes x; see help(type(x)) for signature

Overrides: object.__init__: (inherited documentation)

Class BaseFitter

__call__(self, curve, param_vals, xx, yy, vvv=[], ww=None, on_iter=<__builtin__.function object>, on_status=<__builtin__.function object>) (Call operator)

__init__(self, max_iter=200, toler=1e-10) (Constructor)

call(self, curve, param_vals, xx, yy, vvv=`[]`, ww=None, on_iter=<builtin.function object>, on_status=<builtin.function object>)
(Call operator)

init(self, max_iter=200, toler=1e-10)
(Constructor)