This routine takes the logarithm to a specified base of each pixel of a
to produce a new NDF data structure.
logar in out base
BASE = LITERAL (Read)
The base of the logarithm to be applied. A special value
"Natural" gives natural (base-e) logarithms.
IN = NDF (Read)
Input NDF data
OUT = NDF (Write)
Output NDF data structure being the logarithm of the
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.
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
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