colour.NullInterpolator

class colour.NullInterpolator(x, y, absolute_tolerance=1e-06, relative_tolerance=1e-06, default=nan, dtype=<type 'numpy.float64'>)

Performs 1-D function null interpolation, i.e. a call within given tolerances will return existing \(y\) variable values and default if outside tolerances.

Parameters:

• x (ndarray) – Independent \(x\) variable values corresponding with \(y\) variable.
• y (ndarray) – Dependent and already known \(y\) variable values to interpolate.
• absolute_tolerance (numeric, optional) – Absolute tolerance.
• relative_tolerance (numeric, optional) – Relative tolerance.
• default (numeric, optional) – Default value for interpolation outside tolerances.
• dtype (type) – Data type used for internal conversions.

x

y

relative_tolerance

absolute_tolerance

default

__call__()

Examples

>>> y = np.array([5.9200, 9.3700, 10.8135, 4.5100,
...               69.5900, 27.8007, 86.0500])
>>> x = np.arange(len(y))
>>> f = NullInterpolator(x, y)
>>> f(0.5)
nan
>>> f(1.0)  
9.3699999...
>>> f = NullInterpolator(x, y, absolute_tolerance=0.01)
>>> f(1.01)  
9.3699999...

__init__(x, y, absolute_tolerance=1e-06, relative_tolerance=1e-06, default=nan, dtype=<type 'numpy.float64'>)

Methods

__init__(x, y[, absolute_tolerance, …])