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# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
include <imhdr.h>
include "../icombine.h"
# IC_AVERAGE -- Compute the average image line.
# Options include a weight average.
procedure ic_averages (d, m, n, wts, npts, average)
pointer d[ARB] # Data pointers
pointer m[ARB] # Image ID pointers
int n[npts] # Number of points
real wts[ARB] # Weights
int npts # Number of output points per line
real average[npts] # Average (returned)
int i, j, k
real sumwt, wt
real sum
include "../icombine.com"
begin
# If no data has been excluded do the average without checking the
# number of points and using the fact that the weights are normalized.
# If all the data has been excluded set the average to the blank value.
if (dflag == D_ALL) {
if (dowts) {
do i = 1, npts {
k = i - 1
wt = wts[Memi[m[1]+k]]
sum = Mems[d[1]+k] * wt
do j = 2, n[i] {
wt = wts[Memi[m[j]+k]]
sum = sum + Mems[d[j]+k] * wt
}
average[i] = sum
}
} else {
do i = 1, npts {
k = i - 1
sum = Mems[d[1]+k]
do j = 2, n[i]
sum = sum + Mems[d[j]+k]
average[i] = sum / n[i]
}
}
} else if (dflag == D_NONE) {
do i = 1, npts
average[i] = blank
} else {
if (dowts) {
do i = 1, npts {
if (n[i] > 0) {
k = i - 1
wt = wts[Memi[m[1]+k]]
sum = Mems[d[1]+k] * wt
sumwt = wt
do j = 2, n[i] {
wt = wts[Memi[m[j]+k]]
sum = sum + Mems[d[j]+k] * wt
sumwt = sumwt + wt
}
average[i] = sum / sumwt
} else
average[i] = blank
}
} else {
do i = 1, npts {
if (n[i] > 0) {
k = i - 1
sum = Mems[d[1]+k]
do j = 2, n[i]
sum = sum + Mems[d[j]+k]
average[i] = sum / n[i]
} else
average[i] = blank
}
}
}
end
# IC_AVERAGE -- Compute the average image line.
# Options include a weight average.
procedure ic_averager (d, m, n, wts, npts, average)
pointer d[ARB] # Data pointers
pointer m[ARB] # Image ID pointers
int n[npts] # Number of points
real wts[ARB] # Weights
int npts # Number of output points per line
real average[npts] # Average (returned)
int i, j, k
real sumwt, wt
real sum
include "../icombine.com"
begin
# If no data has been excluded do the average without checking the
# number of points and using the fact that the weights are normalized.
# If all the data has been excluded set the average to the blank value.
if (dflag == D_ALL) {
if (dowts) {
do i = 1, npts {
k = i - 1
wt = wts[Memi[m[1]+k]]
sum = Memr[d[1]+k] * wt
do j = 2, n[i] {
wt = wts[Memi[m[j]+k]]
sum = sum + Memr[d[j]+k] * wt
}
average[i] = sum
}
} else {
do i = 1, npts {
k = i - 1
sum = Memr[d[1]+k]
do j = 2, n[i]
sum = sum + Memr[d[j]+k]
average[i] = sum / n[i]
}
}
} else if (dflag == D_NONE) {
do i = 1, npts
average[i] = blank
} else {
if (dowts) {
do i = 1, npts {
if (n[i] > 0) {
k = i - 1
wt = wts[Memi[m[1]+k]]
sum = Memr[d[1]+k] * wt
sumwt = wt
do j = 2, n[i] {
wt = wts[Memi[m[j]+k]]
sum = sum + Memr[d[j]+k] * wt
sumwt = sumwt + wt
}
average[i] = sum / sumwt
} else
average[i] = blank
}
} else {
do i = 1, npts {
if (n[i] > 0) {
k = i - 1
sum = Memr[d[1]+k]
do j = 2, n[i]
sum = sum + Memr[d[j]+k]
average[i] = sum / n[i]
} else
average[i] = blank
}
}
}
end
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