leastSqFit(fx,
params,
y,
x=None,
**kwargs)
| source code
|
Simple convenience wrapper around SciPy's optimize.leastsq.
The advantage of using this wrapper instead of optimize.leastsq directly
is, that it automatically constructs an appropriate error function and
easily deals with 2d data arrays, i.e. each column with multiple values for
the same function argument (x-value).
- Returns:
- tuple: as returned by scipy.optimize.leastsq
- i.e. 2-tuple with list of final (fitted) parameters of fx and an
integer value indicating success or failure of the fitting procedure
(see leastsq docs for more information).
Parameters:
- fx: functor
- Function to be fitted to the data. It has to take a vector with
function arguments (
x-values) as the first argument, followed by
an arbitrary number of (to be fitted) parameters.
- params: sequence
- Sequence of start values for all to be fitted parameters. During
fitting all parameters in this sequences are passed to the function
in the order in which they appear in this sequence.
- y: 1d or 2d array
- The data the function is fitted to. In the case of a 2d array, each
column in the array is considered to be multiple observations or
measurements of function values for the same
x-value.
- x: Corresponding function arguments (
x-values) for each datapoint, i.e.
- element in
y or columns in y', in the case of `y being a 2d array.
If x is not provided it will be generated by N.arange(m), where
m is either the length of y or the number of columns in y, if
y is a 2d array.
- **kwargs:
- All additonal keyword arguments are passed to fx.
|