[gradsusr] Invalid Line coordinate

[Lyndon Mark Olaguera]

Thanks Sir Martin,

Lyndon


On Sat, Aug 31, 2013 at 7:17 PM, Martin V. Mathew
<vmartinmathew at gmail.com>wrote:

> hi
>
> Sometime back I prepared a script that will plot tracks of multiple
> cyclones as shown in the attached pdf file. This script uses lat,
> lon coordinates saved in text file as in the attached file track1.asc to
> draw the track. You have to specify the coordinates of individual cyclone
> tracks in seperate files.
>
> This script also uses a function named legend_lin_mkr.gs to draw legends
> on the figure. I am attaching that script also with this mail. Hope these
> scripts will help you.
>
> martin
>
>
> On 27 August 2013 18:58, Lyndon Mark Olaguera <
> olagueralyndonmark429 at gmail.com> wrote:
>
>> Hi Sir James,
>> The code is working now,...
>> I have yet another task to do...
>> I would like to plot multiple tracks in grads..I have the location of the
>> eye and plotted the tracks using minimum sea level pressure..
>> i have to compare 3 ctl files.
>> As of now, i can only plot one..How do i plot three tracks in grads?
>>
>> I will appreciate any help.
>> Thanks in advance,
>> Lyndon
>>
>>
>> On Sun, Aug 25, 2013 at 1:44 AM, James T. Potemra <jimp at hawaii.edu>wrote:
>>
>>> Lydon:
>>>
>>> Is this the entire script?  I think you will need to first open a
>>> file and display something.  This will set the scaling environment
>>> in the display.  As the script is, your query statement is likely
>>> not returning a number but an error, e.g.,
>>>
>>> 'q w2xy 'lon1' 'lat1
>>>
>>> returns:
>>> "No scaling environment"
>>>
>>> and thus lon1 is set to "environment".  Try to open a data
>>> set first, set the lat/lon/time/alt, display a variable, then run
>>> your script below.
>>>
>>> Jim
>>>
>>> On 8/23/13 11:32 PM, Lyndon Mark Olaguera wrote:
>>> > i=0
>>> > res=read('urbeye4.txt')
>>> > while(sublin(res,1)!=2)
>>> >   line = sublin(res,2)
>>> >   lat1=subwrd(res,3)
>>> >   lon1=subwrd(res,4)
>>> >  'q w2xy 'lon1' 'lat1
>>> >   xpos1 = subwrd(result,3)
>>> >   ypos1 = subwrd(result,6)
>>> > res=read('urbeye4.txt')
>>> > 'draw wxsym 41 'xpos1' 'ypos1' 0.3 1'
>>> > if (i>0)
>>> > 'set line 1 1 3'
>>> > 'draw line 'xpos1' 'ypos1' 'xpos2' 'ypos2
>>> > endif
>>> >   xpos2=xpos1
>>> >   ypos2=ypos1
>>> >  i=i+1
>>> > endwhile
>>>
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>>>
>>
>>
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>>
>
>
> --
> Martin V. Mathew
> Research scholar
> Centre for Oceans, Rivers, Atmosphere and Land Sciences (CORAL)
> IIT Kharagpur
> India.
>
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