blob: afc1a62eb27bcaafff16b9b02a125ed0d0524d0d (
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 allnl (a, b, npix, errfcn)
long a[ARB], b[ARB]
int npix, i
extern errfcn()
long errfcn()
errchk errfcn
begin
do i = 1, npix {
if (a[i] <= 0)
b[i] = errfcn (a[i])
else {
b[i] = log (double (a[i]))
}
}
end
|
