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Natural logarithm of 2-D scattering transform

returns the natural logarithm of the scattering coefficients in the cell array
`slog`

= log(`sf`

,`s`

)`s`

. `s`

is the output of `scatteringTransform`

and is a cell array of structure arrays with an
`images`

field.

The precision of `slog`

depends on the precision specified in the
network `sf`

.

returns the natural logarithm of the scalogram coefficients in the cell array
`ulog`

= log(`sf`

,`u`

)`u`

. `u`

is the output of `scatteringTransform`

and is a cell array of structure arrays with a
`coefficients`

field.

The precision of `ulog`

depends on the precision specified in the
network `sf`

.

returns the natural logarithm of the 3-D matrix or 4-D tensor `xlog`

= log(`sf`

,`x`

)`x`

.
`x`

is the output of `featureMatrix`

.

The precision of `xlog`

depends on the precision specified in the
network `sf`

.

`log`

returns the natural logarithm of the absolute value of the input
argument.