# Where function inserting missing values. Why?

From: Bridget Thrasher <bthrasher_at_nyahnyahspammersnyahnyah>
Date: Tue Oct 20 2009 - 10:31:52 MDT

I am doing the following in a loop:

mon_avg_obs(m,:,:) = where(mon_avg_obs(m,:,:).eq.0, -2222,
mon_avg_obs(m,:,:))
factors(a*12+m,:,:) = data_all(a*12+m,:,:)/mon_avg_20c(m,:,:)
print("1. "+num(ismissing(factors(a*12+m,:,:))))
factors(a*12+m,:,:) = where(.not.ismissing(mon_avg_obs(m,:,:)),
dvar(a*12+m,:,:)/mon_avg_obs(m,:,:), factors(a*12+m,:,:))
print("2. "+num(ismissing(factors(a*12+m,:,:))))
factors(a*12+m,:,:) =
where(.not.ismissing(mon_avg_obs(m,:,:)).and.mon_avg_obs(m,:,:).eq.-2222,
0., factors(a*12+m,:,:))
print("3. "+num(ismissing(factors(a*12+m,:,:))))

The output on the screen says:
(0) 1. 0
(0) 2. 0
(0) 3. 11753

Why is the last where statement inserting a fill value? I've tried it with
and without the .not.ismissing() part, as well as some other things, but all
yield the same result.

-Bridget

```--
Bridget Thrasher, PhD
Postdoctoral Researcher
Climate Central
www.climatecentral.org

```

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Received on Tue Oct 20 10:31:53 2009

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