LOGE - Takes the natural logarithm of an NDF data structure

Description:

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

This command is a synonym for logar base=natural.

Usage:

loge in out

Parameters:

IN = NDF (Read)

Input NDF data structure.

OUT = NDF (Write)

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

TITLE = LITERAL (Read)

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

Examples:

loge a b

This takes the natural logarithm of the pixels in the NDF called a, to make the NDF called b. NDF b inherits its title from a.

loge title="Cas A" out=b in=a

This takes natural logarithms of the pixels in the NDF called a, to make the NDF called b. NDF b has the title "Cas A".

Related Applications

KAPPA: LOG10, LOGAR, EXP10, EXPE, EXPON, POW; FIGARO: IALOG, ILOG, IPOWER.

Implementation Status:

• 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.