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Methods
SciPy Reference Guide, Release 0.8.dev
fjacb – if the response variable is multi-dimensional, then the return
array’s shape is (q, p, n) such that fjacb(x,beta)[l,k,i] = @f_l(X,B)/@B_k evaluated at the i’th
data point. If q == 1, then the return array is only rank-2 and with shape (p, n).
fjacd – as with fjacb, only the return array’s shape is (q, m, n) such that
fjacd(x,beta)[l,j,i] = @f_l(X,B)/@X_j at the i’th data point. If q == 1, then the return array’s
shape is (m, n). If m == 1, the shape is (q, n). If m == q == 1, the shape is (n,).
set_meta(**kwds) Update the metadata dictionary with the keywords and data provided
set_meta(**kwds)
Update the metadata dictionary with the keywords and data provided here.
class ODR(data, model, beta0=None, delta0=None, ifixb=None, ifixx=None, job=None, iprint=None, errfile=None,
rptfile=None, ndigit=None, taufac=None, sstol=None, partol=None, maxit=None, stpb=None,
stpd=None, sclb=None, scld=None, work=None, iwork=None)
The ODR class gathers all information and coordinates the running of the main fitting routine.
Members of instances of the ODR class have the same names as the arguments to the initialization routine.
Parameters
Required: :
data – instance of the Data class
model – instance of the Model class
beta0 – a rank-1 sequence of initial parameter values. Optional if
model provides an “estimate” function to estimate these values.
Optional:
delta0 – a (double-precision) float array to hold the initial values of
the errors in the input variables. Must be same shape as data.x .
ifixb – sequence of integers with the same length as beta0 that determines
which parameters are held fixed. A value of 0 fixes the parameter, a value > 0
makes the parameter free.
ifixx – an array of integers with the same shape as data.x that determines
which input observations are treated as fixed. One can use a sequence of
length m (the dimensionality of the input observations) to fix some dimensions
for all observations. A value of 0 fixes the observation, a value > 0
makes it free.
job – an integer telling ODRPACK what tasks to perform. See p. 31 of the
ODRPACK User’s Guide if you absolutely must set the value here. Use the
method set_job post-initialization for a more readable interface.
iprint – an integer telling ODRPACK what to print. See pp. 33-34 of the
ODRPACK User’s Guide if you absolutely must set the value here. Use the
method set_iprint post-initialization for a more readable interface.
errfile – string with the filename to print ODRPACK errors to. *Do Not Open
This File Yourself!*
3.11. Orthogonal distance regression (scipy.odr) 293