Re: Question about reading in data

From: Gerry Creager <gerry.creager_at_nyahnyahspammersnyahnyah>
Date: Tue Nov 08 2011 - 20:37:16 MST

Thanks, Dennis. I'd COMPLETELY forgotten that!

gerry

Dennis Shea wrote:
> It has nothing to do with fortran.
> netCDF-3 does not support strings only characters.
>
> sta_id_c = f->stationId
> sta_id_s = tostring(sta_id_c)
> delete(sta_id_c)
>
> or, better
>
> sta_id = tostring(f->stationId)
>
> print(sta_id)
>
>
> ---
> netCDF-4 supports strings
>
> Good luck
>
> On 11/08/2011 03:58 PM, Gerald Creager wrote:
>> Howdy!
>>
>> I've got a known netcdf file with some interesting attributes.
>> Apparently string variables are inserted as arrays, perhaps to support
>> older Fortran applicaitons...
>>
>> Excerpting from an ncl_filedump output:
>> dimensions:
>> ncl_scalar = 1
>> maxLDADmessageLen = 512
>> maxSkyCover = 6
>> maxSkyLen = 8
>> maxStaTypeLen = 11
>> maxProviderIdLen = 12
>> maxStaIdLen = 6
>> maxNameLength = 51
>> maxHomeWFOlen = 4
>> maxWeatherLen = 25
>> maxSensor = 2
>> maxLDADtestLen = 51
>> QCcheckNum = 10
>> QCcheckNameLen = 60
>> ICcheckNum = 55
>> ICcheckNameLen = 72
>> maxStaticIds = 30000
>> totalIdLen = 24
>> nInventoryBins = 24
>> maxPSTEntries = 300
>> recNum = 5288 // unlimited
>> character stationId ( recNum, maxStaIdLen )
>> long_name : alphanumeric station Id
>> reference : station table
>>
>> character handbook5Id ( recNum, maxStaIdLen )
>> long_name : Handbook5 Id (AFOS or SHEF id)
>> reference : station table
>>
>> character stationName ( recNum, maxNameLength )
>> long_name : alphanumeric station name
>> reference : station table
>>
>> And a print of the data for stationName yields:
>> ncl 16> print(stnName)
>>
>>
>> Variable: stnName
>> Type: character
>> Total Size: 269688 bytes
>> 269688 values
>> Number of Dimensions: 2
>> Dimensions and sizes: [recNum | 5288] x [maxNameLength | 51]
>> Coordinates:
>> Number Of Attributes: 2
>> long_name : alphanumeric station name
>> reference : station table
>> (0,0) C
>> (0,1) h
>> (0,2) e
>> (0,3) r
>> (0,4) r
>> (0,5) y
>> (0,6)
>> (0,7) P
>> (0,8) o
>> (0,9) i
>> (0,10) n
>> (0,11) t
>> (0,12) ,
>> (0,13)
>> (0,14) W
>> (0,15) A
>> (0,16) 0x00
>> (0,17) 0x00
>> ...
>>
>> ncl 19> print (stnId)
>>
>>
>> Variable: stnId
>> Type: character
>> Total Size: 31728 bytes
>> 31728 values
>> Number of Dimensions: 2
>> Dimensions and sizes: [recNum | 5288] x [maxStaIdLen | 6]
>> Coordinates:
>> Number Of Attributes: 2
>> long_name : alphanumeric station Id
>> reference : station table
>> (0,0) C
>> (0,1) H
>> (0,2) Y
>> (0,3) W
>> (0,4) 1
>> (0,5) 0x00
>> (1,0) A
>> (1,1) P
>> (1,2) 1
>> (1,3) 6
>> (1,4) 4
>> (1,5) 0x00
>> (2,0) A
>> (2,1) P
>> (2,2) 2
>> (2,3) 0
>> (2,4) 4
>> (2,5) 0x00
>> ...
>>
>>
>> Is there a good way to read in the data so that the character data are
>> read as strings?
>>
>> Thanks gerry
>
>

-- 
Gerry Creager -- gerry.creager@tamu.edu
Texas Mesonet -- AATLT, Texas A&M University
Cell: 979.229.5301 Office: 979.458.4020 FAX: 979.862.3983
Office: 1700 Research Parkway Ste 160, TAMU, College Station, TX 77843
_______________________________________________
ncl-talk mailing list
List instructions, subscriber options, unsubscribe:
http://mailman.ucar.edu/mailman/listinfo/ncl-talk
Received on Tue Nov 8 20:37:24 2011

This archive was generated by hypermail 2.1.8 : Mon Nov 14 2011 - 10:41:55 MST