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using CrystFEL
st = Stream("input.stream", "r")
sym = SymOpList("2/m_uab")
merged = RefList{MergedReflection}(sym)
for (cr,reflections) in allcrystals(st)
for refl in reflections
indices = asymmetricindices(sym, refl.indices)
model_version = merged[indices]
if model_version === nothing
model_version = push!(merged, indices)
end
w = 1.0
mean = model_version.intensity
sumweight = model_version.temp1
M2 = model_version.temp2
temp = w + sumweight
delta = refl.intensity - mean
R = delta * w / temp
model_version.intensity = mean + R
model_version.temp1 = temp
model_version.temp2 = M2 + sumweight * delta * R
model_version.nmeasurements += 1
end
end
for refl in merged
if refl.nmeasurements > 1
refl.sigintensity = sqrt(refl.temp2/refl.temp1)/sqrt(refl.nmeasurements)
else
refl.nmeasurements = 0
end
end
savereflist!(merged, "merged.hkl")
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