# [ncl-talk] problem with missing values

Dennis Shea shea at ucar.edu
Fri Dec 12 15:20:56 MST 2014

```printVarSummary(x364)

What is the _FillValue ?

---

et_default_fillvalue("float", -9999.0)
pweek=new((/47,52/),"float")            ; pweek at _FillValue

do i=0,47-1
do j=0,357,7

pweek(i,j/7)=avg(x364(i,j:j+6))

if x364 has an _FillValue of 9.92226e+36
and the result of avg is a missing value,
the _FillValue of x354 will transfer to pweek
Also, 9.92226e+36 is the 'printed' value, This is not the
actual value. Rounding has occurred for printing purposes.

if x364 at _FillValue = 9.92226e+36
and you prefer -9999.0 then set
x364 at _FillValue == pweek at _FillValue *before* the loop

;  end if
end do
end do

I think the above should fix your issue.

The whole loop below could be done much more efficiently

pweek = where(pweek.gt. 1e25, pweek at _FillValue, pweek)

do i=0,47-1
do j=0,51
print(i)
print(j)
if (pweek(i,j).eq.9.92226ee+36)then
pweek(i,j)=9999.0
end if
end do
end do

On Fri, Dec 12, 2014 at 3:10 PM, Ipshita Majhi <ipmajhi at alaska.edu> wrote:
>
> Thank you
>
> Yes it is a typo in the code I fixed it yet it still gives max value as
> 9.6921e+36 , and if I write to substitute it then it gives 9.92226e+36 as
> the max value.
>
> Best Regards
> Ipshita
>
>
>
> On Friday, December 12, 2014, Gus Correa <gus at ldeo.columbia.edu> wrote:
>
>> Hi Ipshita
>>
>> Is this a typo in your email or in the code?
>>
>>  > if (pweek(i,j).eq.9.92226ee+36)then
>>
>> Note the double "ee".
>>
>> Gus Correa
>>
>> On 12/12/2014 04:29 PM, Ipshita Majhi wrote:
>> > Dear NCL ,
>> >
>> > I have written a code to write to convert 365 days into 52 weeks avg.
>> > I am facing error regarding missing value. I have written statements
>> > which have substituted missing value as -9999.0
>> > Yet it gives the maximum value as 9.96921e+36 and when I write to
>> > substitute that with -9999.0, it gives maximum value as 9.969222e+36.
>> > Here is the snippet of my code. I am very confused about this. It will
>> > be great if somebody could help me
>> >
>> > set_default_fillvalue("float", -9999.0)
>> >
>> > pweek=new((/47,52/),"float")
>> >
>> >
>> > do i=0,47-1
>> > do j=0,357,7
>> >
>> > pweek(i,j/7)=avg(x364(i,j:j+6))
>> >
>> > ;  end if
>> > end do
>> > end do
>> >
>> >
>> > do i=0,47-1
>> > do j=0,51
>> > print(i)
>> > print(j)
>> > if (pweek(i,j).eq.9.92226ee+36)then
>> > pweek(i,j)=9999.0
>> > end if
>> > end do
>> > end do
>> >
>> > printMinMax(pweek, 0)
>> >
>> > Thank You
>> > Best Regards
>> > Ipshita
>> >
>> >
>> >
>> > _______________________________________________
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>> >
>>
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