LOGAR

Takes the logarithm (specified base) of an NDF data structure

This routine takes the logarithm to a specified base of each pixel of a NDF to produce a new NDF data structure.

logar in out base

The base of the logarithm to be applied. A special value "Natural" gives natural (base-e) logarithms.

Input NDF data structure.

Output NDF data structure being the logarithm of the input NDF.

The title for the output NDF. A null value will cause the title of the NDF supplied for Parameter IN to be used instead. [!]

logar a b 10

This takes logarithms to base ten of the pixels in the NDF called a, to make the NDF called b. NDF b inherits its title from a.

logar base=8 title="HD123456" out=b in=a

This takes logarithms to base eight of the pixels in the NDF called a, to make the NDF called b. NDF b has the title "HD123456".

This routine correctly processes the AXIS, DATA, QUALITY, LABEL, TITLE, UNITS, HISTORY, WCS, and VARIANCE components of an NDF data structure and propagates all extensions.
Processing of bad pixels and automatic quality masking are supported.
All non-complex numeric data types can be handled.