Re: Band-Pass Filter

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---
Not sure what is happening on your end.
Does your sounding containing missing values?
---
The following works fine:
   [snip]
   printVarSummary(skewt_bkgd)
   printVarSummary(skewt_data)
   print("skewt_bkgd@Cape="+skewt_bkgd@Cape)
   print("skewt_data@Cape="+skewt_data@Cape)
----
Variable: skewt_bkgd
Type: obj
Total Size: 4 bytes
             1 values
Number of Dimensions: 1
Dimensions and sizes:	[1]
Coordinates:
Number Of Attributes: 7
   data :	skewt_data	coordArraysClass	87
   dataspec :	skewt_data	xyDataSpecClass	109
   Tlcl :	24.10441
   Plcl :	927.8906
   Shox :	2.998047
   Pwat :	5.268123
   Cape :	4455.835
Variable: skewt_data
Type: obj
Total Size: 4 bytes
             1 values
Number of Dimensions: 1
Dimensions and sizes:	[1]
Coordinates:
Number Of Attributes: 7
   data :	skewt_data	coordArraysClass	87
   dataspec :	skewt_data	xyDataSpecClass	109
   Tlcl :	24.10441
   Plcl :	927.8906
   Shox :	2.998047
   Pwat :	5.268123
   Cape :	4455.835
(0)	skewt_bkgd@Cape=4455.84
(0)	skewt_data@Cape=4455.84
On 2/27/12 2:47 PM, Yang Yang wrote:
> Hi Dennis:
>
> Thank you for your help!
>
> I tried your suggestion. It still does not work. Please see my script below. The information after the run is:
>
> warning:Attempt to reference attribute (Cape) which is undefined
> (0)     -999
> warning:Attempt to reference attribute (Cape) which is undefined
> (0)     -999
>
> Regards
> Ed
>
> ;*************************
> ;ncl script
> ;**************************
>    wks  = gsn_open_wks ("x11", "skewt_test_new")
>
> ; --- Create background skew-T; plot sounding ---------------------
>
>    skewtOpts                 = True
>    skewtOpts@DrawColAreaFill = True    ; default is False
>    skewtOpts@tiMainString    = "Raob Data; No Winds"
>
>    dataOpts   = True        ; no options
>
>    dataOpts@PrintZ = True
>    skewt_bkgd = skewT_BackGround (wks, skewtOpts)
>    skewt_data = skewT_PlotData   (wks, skewt_bkgd, pp,tt,tc,h \
>                                      , wsp,dir, dataOpts)
>    draw (skewt_bkgd)
>    draw (skewt_data)
>    frame(wks)
>
> print(skewt_bkgd@Cape)
> print(skewt_data@Cape)
>
>
> --- On Tue, 2/28/12, Dennis Shea<shea@ucar.edu>  wrote:
>
>> From: Dennis Shea<shea@ucar.edu>
>> Subject: Re: Band-Pass Filter
>> To: "Abhik Santra"<abhiksantra@tropmet.res.in>
>> Cc: ncl-talk@ucar.edu
>> Date: Tuesday, February 28, 2012, 12:49 AM
>> "band_pass_latlon_time"  was
>> developed for one level.
>> You will have to loop over each level.
>>
>> Good Luck
>>
>> On 2/27/12 12:33 AM, Abhik Santra wrote:
>>>
>>> Dear All,
>>>
>>>            I use
>> "band_pass_latlon_time" function with spd=1.0 and nwt=201 to
>> keep all frequencies between 10 and 90 day for single level
>> variable.  Now, I want to do the same for
>> multiple-level variables. But the "band_pass_latlon_time"
>> function doesn't allow more than 1 level. Is there any other
>> function to do that?  Or should I do the same for each
>> level separately?
>>>
>>> Regards,
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