`numpy.polynomial.polyutils:mapparms`

source: /numpy/polynomial/polyutils.py :241

Signature

def mapparms ( old , new )

Summary

Linear map parameters between domains.

Extended Summary

Return the parameters of the linear map offset + scale*x that maps old to new such that old[i] -> new[i], i = 0, 1.

Parameters

old, new : array_like: Domains. Each domain must (successfully) convert to a 1-d array containing precisely two values.

Returns

offset, scale : scalars: The map L(x) = offset + scale*x maps the first domain to the second.

Notes

Also works for complex numbers, and thus can be used to calculate the parameters required to map any line in the complex plane to any other line therein.

Examples

from numpy.polynomial import polyutils as pu
pu.mapparms((-1,1),(-1,1))
pu.mapparms((1,-1),(-1,1))
i = complex(0,1)
pu.mapparms((-i,-1),(1,i))

✓

Aliases

numpy.polynomial.polyutils.mapparms