Re: FFTA encountered missing data a ...

[Ansley Manke <ansley@xxxxxxxxxxxxx>]

Hi Antonio,
The FFT functions work on  time series having no missing
data. The error message indicates that the first time step of the
data you're sending to the function has missing data.  You might
try listing the first few times of  variable_mean[l=1:428] to
see what's happening, or look at what is in the variable with
the command

yes? STAT variable_mean[l=1:428]

Ansley Manke

arv@ono.com wrote:

> Hi,
>
> I've tried to perform the following FFTA analysis but I get this
> result.Don't know where is my mistake
>
> Thanks in advance.
>
> Antonio Rodriguez
>
> use wind.nc
> DEF AXIS/T=16-JAN-1967:17-AUG-2002:1/UNITS=months regt
>  *** NOTE: /UNIT=MONTHS is ambiguous ... using 1/12 of 365.2425 days
> DEF AXIS/X=10W:6W:1 x10
> DEF AXIS/y=34n:38n:1 y10
> DEFINE GRID/x=x10/y=y10 g10x10
> SET GRID g10x10
> LET regular_variable = UV_MAG_MEAN[GT=regt]
> LET variable_mean = regular_variable[x=10w:6w@ave,y=34n:38n@ave]
> LET FFT_variable = FFTA(variable_mean[l=1:428])
>  PLOT FFT_variable
>  *** NOTE: CYC/MONTHS                               is ambiguous ...
> using 1/12 of 365 days.
>
> Bailing out of external function "ffta":
>         FFTA encountered missing data at (i,j,k,l) -111 -111 -111    1
>  **ERROR: : error in external function

--
Ansley Manke  Pacific Marine Environmental Laboratory  Seattle WA  (206)526-6246