**To**:**Ansley Manke <ansley@xxxxxxxxxxxxx>****Subject**:**Re: FFTA encountered missing data a ...****From**:**antonio rodriguez <arv@xxxxxxx>**- Date: Wed, 02 Oct 2002 10:08:12 +0200
- Cc: ferret_users@xxxxxxxxxxxxxxxxxxx
- References: <163b61c04a.1c04a163b6@ono.com> <3D99CB95.41660153@pmel.noaa.gov>
- Sender: owner-ferret_users@xxxxxxxxxxxxxxxxxxx
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Hi Ansley, Ansley Manke wrote:

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]

You are rigth I have 1 value flagged as bad data at this location: (i,j,k,l) -111 -111 -111 1

How do I can overcome this problem? Maybe replacing the bad value with the mean? but how?

Thanks in advance

Cheers,

Antonio

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

**Follow-Ups**:**Re: FFTA encountered missing data a ...***From:*Ansley Manke

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