[ferret_users] Error while running FFT analysis

ferret

NOAA/PMEL TMAP

FERRET v6.72

Linux 2.6.32-131.12.1.el6.x86_64 64-bit - 09/13/11

30-Jun-12 20:33

yes? go fft2drun.jnl

! fft2drun.jnl 06/00

! Description: computes and plots running power spectrum for variable "specvar"

! Usage: go fft2drun "plot title" "Taxis" "tlo:thi:dt" window

! where;

!1 -plot title

!2 Taxis -the name of the input /T axis for specvar

!3 tlo:thi:dt -is the time axis specification for the running power

! spectrum, and must not have more than 1100 grid points

! (or memory limits will be hit)

!4 window - (half window length)/dt

! Example: to plot running power spectrum of "myvar" with 200 gridpoint wide window

! for the time range of -2000 to -2 and where myvar has the time axis "Tw"

! yes? Let specvar=myvar

! yes? Go fft2drun "my title" "Tw" "-2000:-2:2" 100

! Output: can use routine within the script with adjusted ranges and annotation

! or else can use "series_fft*series_fft" with one's own plot routine

! Note might need to modify smoothing of specvar within script ("let wtser...")

!----------------------------------------------------------

Cached data cleared from memory

**ERROR: invalid command: Value needed for argument 3 in command

GO fft2drun.jnl

define axis/T=$3 lyear

Command file, command group, or REPEAT execution aborted