simpeg.maps.ExpMap.inverse#

ExpMap.inverse(D)[source]#

Apply the inverse of the exponential mapping to an array.

For the exponential mapping \(\mathbf{u}(\mathbf{m})\), the inverse mapping on a variable \(\mathbf{x}\) is performed by taking the natural logarithms of elements, i.e.:

\[\mathbf{m} = \mathbf{u}^{-1}(\mathbf{x}) = log(\mathbf{x})\]
Parameters:
Dnumpy.ndarray

A set of input values

Returns:
numpy.ndarray

A numpy.ndarray containing result of applying the inverse mapping to the elements in D; which in this case is the natural logarithm.