| Re: Formatting strings to coordinates [message #20138] |
Fri, 19 May 2000 00:00 |
Paul van Delst
Messages: 364
Registered: March 1997
|
Senior Member |
|
|
Simon de Vet wrote:
>
> The data analysis adventure continues... I have read in the data, and am
> now working on the various plots.
>
> I have a string array, taken from the text file, of coordinates.
> However, they are in the form "43.92�S" ,and "176.50�W".
Off the top of my head, I can think of two ways:
1) The STR_SEP method where the degree symbol, �, is the separator. The
first element of the result is then just the number in string form. By
using FLOAT, you'll have a real number. (However, I don't know how to
represent the symbol � in the command....ASCII escape sequence or
something like that?)
2) Lopping off the last two characters manually, e.g.:
c_lat = "43.92�S"
len = STRLEN( STRTRIM( c_lat, 2 ) ) ; Make sure there are no " " at
the end
c_lat = STRMID( c_lat, 0, len - 2 )
lat = FLOAT( c_lat )
I do this sort of thing all the time reading in radiosonde data
good luck
paulv
--
Paul van Delst Ph: (301) 763-8000 x7274
CIMSS @ NOAA/NCEP Fax: (301) 763-8545
Rm.202, 5200 Auth Rd. Email: pvandelst@ncep.noaa.gov
Camp Springs MD 20746
|
|
|
|
| Re: Formatting strings to coordinates [message #20143 is a reply to message #20138] |
Fri, 19 May 2000 00:00  |
Andy Loughe
Messages: 174
Registered: November 1995
|
Senior Member |
|
|
Simon de Vet wrote:
>
> The data analysis adventure continues... I have read in the data, and am
> now working on the various plots.
>
> I have a string array, taken from the text file, of coordinates.
> However, they are in the form "43.92�S" ,and "176.50�W".
>
> I would like to be able to take this array of strings and convert it to
> a numerical array or real latitudes and longitudes, from -90 to 90 and 0
> to 360 so that they can eventually be plotted onto a globe.
>
> I've figured out how to use strings to generate numerical values (ie:
> 'Jan' -> 1, 'Feb' -> 2, etc..), but not how to handle parts of strings
> to modify the other parts.
>
> Any suggestions? This group has been a major help so far!
>
> Thanks,
>
> Simon
For example...
lat1 = ['43.92�S', '43.92�N', '43.92�S', '43.92�N']
lat2 = (-2 * (strpos(lat1, 'S') ge 0) + 1) * float(lat1)
--
Andrew Loughe **********************************************************
NOAA/FSL/AD Mailstop: R/FS5 * Email: loughe@fsl.noaa.gov
325 Broadway * Web: www-ad.fsl.noaa.gov/users/loughe/
Boulder, CO 80303 * Phn/Fax: (303)497-6211 / (303)497-6301
|
|
|
|
comp.lang.idl-pvwave archive
Members
Search
Help
Login
Home
