[ncl-talk] error: fatal:The result of the conditional expression yields a missing value. NCL can not determine branch, see ismissing function

[Xi Chang]

so that in the end, i would have only as *date(station) * contain the index
pointed to first date having negative value..


On Sat, Aug 23, 2014 at 6:21 AM, Xi Chang <xi.chang01 at gmail.com> wrote:

> I checked,, they are ok,, Im just afradi that the problem is here
>
> ...
> *  delete(indices)*
> *  delete(first)*
> end do
>
> I delete them, so the the return value can not be loaded when i=1->173, as
> they are deleted when i=0.
> do you have any suggestion,, i just want to save every first date which
> has negative value from my 2D data (station, time).
>
> Thank you
>
>
>
>
> On Sat, Aug 23, 2014 at 6:12 AM, Michael Notaro <mnotaro at wisc.edu> wrote:
>
>> Perhaps sometimes you never have a negative data value. Then indices
>> would be empty.Try printing indices each time in the 0,173 loop to check.
>>
>>
>> On 08/22/14, Xi Chang  wrote:
>> > Thanks NCL and Michael,
>> >
>> > Do you know the source of this following error: fatal:The result of the
>> conditional expression yields a missing value. NCL can not determine
>> branch, see ismissing function
>> >
>> >
>> > do j=0,173
>> > indices=ind(data1(j,:).lt.0.)
>> > first=indices(0)
>> > if(first.gt.121) then
>> > date(j)=(first-121)+365
>> > else
>> > date(j)=first+244
>> > end if
>> > delete(indices)
>> > delete(first)
>> > end do
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> > On Fri, Aug 22, 2014 at 5:40 AM, Michael Notaro <mnotaro at wisc.edu(javascript:main.compose()>
>> wrote:
>> >
>> > > I think this should work.
>> > >
>> > >
>> > > Say, the daily time series is x(0:364).
>> > >
>> > > indices=ind(x.lt.0.)
>> > > first=indices(0)
>> > >
>> > >
>> > >
>> > >
>> > > On 08/21/14, Xi Chang wrote:
>> > > > Hallo NCL people,
>> > > >
>> > >
>> > > > I have a question, i have a daily data 1D (point),, i&#39;d like to
>> get the index which has the first negative value and save the index per
>> year. if i have 20 years, then i&#39;ll have 20 indices which are
>> associated with first negative value each year.
>> > > >
>> > > >
>> > > > Thank you.
>> > >
>>
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://mailman.ucar.edu/pipermail/ncl-talk/attachments/20140823/3bcd293b/attachment.html