[gradsusr] Error opening .txt file in a grads script
James T. Potemra
jimp at hawaii.edu
Mon Nov 30 14:50:29 EST 2015
Hi Keren,
Another possibility is that you haven't displayed a variable yet, thus
you don't have plotting dimensions defined. If you open "dummy.ctl" and
then don't display anything, I think your "q w2xy" line will return "No
scaling environment", then this will cause "xloc" and "yloc" to be
improperly defined. Try display something first from your file "dummy.ctl".
Also, it helps to use the "say" function to display these variables
within your script to help diagnose the problem. For example, adding
say xloc', 'yloc will print these values to the screen.
Jim
On 11/30/15 9:39 AM, Jeff Duda wrote:
> Keren,
> You have a lot of extra spaces floating around in your commands. As
> far as I know, when you're inserting script variables into a command
> in a grads script, you need to be very explicit with the formatting of
> the command. In other words, the spaces around your 'lat', 'lon',
> 'xloc', and 'yloc' may be causing the syntax error. I recommend
> removing those spaces and trying again. For example, change
>
> "draw mark "flag " "xloc " "yloc " 0.1"
>
> into
>
> "draw mark "flag" "xloc" "yloc" 0.1"
>
> Jeff
>
> On Mon, Nov 30, 2015 at 1:30 PM, Keren Rosado - NOAA Affiliate
> <keren.rosado at noaa.gov <mailto:keren.rosado at noaa.gov>> wrote:
>
> Thanks Jeff,
>
> I already used the q w2xy and I don't see any error.
>
>
> Here is the rest of the script
>
> file ="lightning_from00z29April.004.txt"
> colors="1 2 3 4 5 6 7 8 9 10 11 12 13"
> ccount=0
>
> rc=1
> while (rc != 2)
> data=read(file)
> rc=sublin(data,1)
> if (rc != 2)
> line=sublin(data,2)
> chk=substr(line,1,10)
> if (chk != "----------")
>
> lat=subwrd(line,1)
> lon=subwrd(line,2)
> flag=subwrd(line,3)
> color=subwrd(line,4)
>
>
> "q w2xy "lon " " lat
> xloc=subwrd(result,3)
> yloc=subwrd(result,6)
> name=subwrd(ccount,1)
>
> "set line "color" 1 5"
> "set lat -20 20"
> "set lon -40 25"
> "draw mark "flag " "xloc " "yloc " 0.1"
> * "draw mark 1 " xloc " "yloc " 0.06"
> else
> ccount=ccount+1
> endif
> endif
> endwhile
>
>
> 'set string 1 tc 1'
> 'set strsiz .30'
>
>
> ----
> Keren Rosado
> PhD Candidate/Howard University/NOAA EPP GRTSP Fellow
> Intern/NOAA/NWS/NCEP/EMC
> 5830 University Research CT
> Cubicle 2795
> College Park, MD 20740
> Tel: (301)-683-3816 <tel:%28301%29-683-3763>
> Cel: _(407)-621-1676 _
> Email: Keren.Rosado at noaa.gov <mailto:Keren.Rosado at noaa.gov>
>
> On Mon, Nov 30, 2015 at 2:06 PM, Jeff Duda <jeffduda319 at gmail.com
> <mailto:jeffduda319 at gmail.com>> wrote:
>
> Keren,
>
> The error tells you what the problem is. You must have a "draw
> mark" command somewhere in your script that has a syntax error
> in it. You can use the grads documentation index to determine
> values of the various arguments to that function. I suspect
> you have an error in your x and y arguments in the function
> call. The x and y arguments need to be in real page units, not
> world coordinates. You'll need to use the 'query (position)'
> functions to translate between world coordinates, grid
> coordinates, and page coordinates. A commonly used one is 'q
> w2xy', which would convert world coordinates to real page
> coordinates.
>
> Jeff Duda
>
> On Mon, Nov 30, 2015 at 12:51 PM, Keren Rosado - NOAA
> Affiliate <keren.rosado at noaa.gov
> <mailto:keren.rosado at noaa.gov>> wrote:
>
> The text file is big but from what I can see is all numbers.
>
> 11.228 -73.969 1
> 13.983 5.299 1
> 13.790 -14.934 1
> 22.645 -51.073 1
> 11.254 -73.973 1
> 6.508 -61.990 1
> 11.405 4.011 1
> 29.012 -59.311 1
> 11.262 -74.027 1
> 10.631 -68.972 1
> 11.270 -73.941 1
> 11.341 -73.955 1
> 11.295 -73.604 1
> 11.269 -73.595 1
> 11.231 -73.537 1
> 11.254 -73.611 1
>
>
> When I type "run namescript.gs <http://namescript.gs>" I
> get the following error:
>
> DRAW error: Syntax is DRAW MARK marktype x y size
> DRAW error: Syntax is DRAW MARK marktype x y size
> DRAW error: Syntax is DRAW MARK marktype x y size
> DRAW error: Syntax is DRAW MARK marktype x y size
> DRAW error: Syntax is DRAW MARK marktype x y size
> DRAW error: Syntax is DRAW MARK marktype x y size
>
> But when I run the script line by line the first error I
> get is the one I send in the first email.
>
>
> Thanks
>
>
> ----
> Keren Rosado
> PhD Candidate/Howard University/NOAA EPP GRTSP Fellow
> Intern/NOAA/NWS/NCEP/EMC
> 5830 University Research CT
> Cubicle 2795
> College Park, MD 20740
> Tel: (301)-683-3816 <tel:%28301%29-683-3763>
> Cel: _(407)-621-1676 <tel:%28407%29-621-1676> _
> Email: Keren.Rosado at noaa.gov <mailto:Keren.Rosado at noaa.gov>
>
> On Mon, Nov 30, 2015 at 1:16 PM, Jeff Duda
> <jeffduda319 at gmail.com <mailto:jeffduda319 at gmail.com>> wrote:
>
> The snippet of script code you included isn't
> consistent with the output you included. I can't see
> from what you included what would be the cause of the
> error. Do you have non-alphanumeric characters in your
> text file? Otherwise I suspect you have a syntax error
> in your script somewhere else.
>
> Jeff Duda
>
> On Mon, Nov 30, 2015 at 10:36 AM, Keren Rosado - NOAA
> Affiliate <keren.rosado at noaa.gov
> <mailto:keren.rosado at noaa.gov>> wrote:
>
> Hello,
>
> I am trying to open a .txt file in a .gs grads
> script without luck.
> Grads version 2.0.1
>
>
> This is what I have
>
> 'open dummy.ctl'
> file = 'A20100826a.txt'
> colors="1 2 3 4 5 6 7 8 9 10 11 12 13"
> ccount=0
>
> rc=1
> while (rc != 2)
> data=read(file)
> rc=sublin(data,1)
> if (rc != 2)
> line=sublin(data,2)
> chk=substr(line,1,10)
> if (chk != "----------")
> .
> .
> .
> .
> The code keeps going but the error is at the
> "file" line.
>
> Here is the error
> file = 'A20100826a.txt'
> Syntax Error: Expected operand or '('
> Error ocurred at column 1
> DEFINE error: Invalid expression.
>
> Thanks!
>
>
>
> ----
> Keren Rosado
> PhD Candidate/Howard University/NOAA EPP GRTSP Fellow
> Intern/NOAA/NWS/NCEP/EMC
> 5830 University Research CT
> Cubicle 2795
> College Park, MD 20740
> Tel: (301)-683-3816 <tel:%28301%29-683-3763>
> Cel: _(407)-621-1676 <tel:%28407%29-621-1676> _
> Email: Keren.Rosado at noaa.gov
> <mailto:Keren.Rosado at noaa.gov>
>
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>
>
>
>
> --
> Jeff Duda
> Graduate research assistant
> University of Oklahoma School of Meteorology
> Center for Analysis and Prediction of Storms
>
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>
>
>
> --
> Jeff Duda
> Graduate research assistant
> University of Oklahoma School of Meteorology
> Center for Analysis and Prediction of Storms
>
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>
>
> --
> Jeff Duda
> Graduate research assistant
> University of Oklahoma School of Meteorology
> Center for Analysis and Prediction of Storms
>
>
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