blob: 469ce44842833a35eed1ab10181d67f644d615d9 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
|
# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
# ALLN -- Compute the natural logarithm of a vector (generic). If the natural
# logarithm is undefined (x <= 0) a user supplied function is called to get
# the pixel value to be returned.
procedure allnr (a, b, npix, errfcn)
real a[ARB], b[ARB]
int npix, i
extern errfcn()
real errfcn()
errchk errfcn
begin
do i = 1, npix {
if (a[i] <= 0.0)
b[i] = errfcn (a[i])
else {
b[i] = log (a[i])
}
}
end
|
