[gradsusr] Script errors

[Murphy, Darren W]

Austin,

Thank you again for the help.  It has become a little more clear.

My building of the script was a trial and error effort.  It seemed that the
method I used in each case was the only one the the script would accept.

As originally defined, minval and maxval are "grads defined variables", so
to stick with that, how would I construct the 2 lines you mentioned?
'cval1 = 'minval'/5*4'
if (minval <= 0)
 

Shouldn't this work?
'cval1 = minval/5*4'    - edit - it does


if ('minval' > 0)  
'set clevs minval cval1 cval2 cval3 cval4 cval5 cval6 cval7 cval8 maxval'
edit - I am still entering the if statement with a minval<0 and getting the
clevs error

Thanks,
Darren

On 1/10/11 11:26 AM, "Austin Conaty" <Austin.L.Conaty at nasa.gov> wrote:

> After reading the script a little closer it looks like
> you are treating minval (and maxval) in 2 difference ways.
> when you surround it by ' minval ' single quotes it means one thing,
> when you don't surround it by quotes it means something different.
> 
> in other words
> 'minval = 0'
> is equivalent to
> 'define minval = 0'
> However, minval = 0
> creates a grads script variable which you must later refer  to as 'minval'
> 
> here you address minval as a grads script variable
> in two different lines of code
> 
> 'cval1 = 'minval'/5*4'
> if (minval <= 0)
> 
> here you address minval as a grads defined variable
> 
> 'minval = 0'
> 
> 'minval = min(min(eof,lon='lon1',lon='lon2'),lat='lat1',lat='lat2')'
> 
> 
> It's perfectly legal to use minval as a defined
> variable and also as a grads script variable
> but it's not advisable as it gets hard to keep
> track of which is which.
> 
> 
> Murphy, Darren W wrote:
>> Austin,
>> 
>> Thanks for checking out the script.  I had been doing some testing of the
>> script and changing the logic to check to see if it was by default entering
>> the statement.  I forgot to change it back.  Those lines should read...
>> 
>> 
>>   
>>>> if (minval > 0)
>>>> prompt 'minval greater than 0'
>>>>       
>> 
>> The problem persists though.  With minval of -0.52 it still enters the
>> minval>0 statement.
>> 
>> Thanks,
>> Darren
>> 
>> On 1/10/11 7:57 AM, "Austin Conaty" <Austin.L.Conaty at nasa.gov> wrote:
>> 
>>   
>>> Darren,
>>> 
>>> if (minval <= 0)
>>> prompt 'minval greater than 0'
>>> 
>>> I think this is where you have a logic problem
>>> 
>>> If minval less than or equal to zero
>>> prompt minval greater than zero
>>> 
>>> Is this really what you mean to do?
>>> 
>>> Murphy, Darren W wrote:
>>>     
>>>> All,
>>>> 
>>>> I¹m using Grads 2.0.a9.
>>>> 
>>>> The script below throws a couple of errors.  Earlier I thought it was an
>>>> string 
>>>> not compatible with numeric calculations.  Following Jeff Duda¹s (Thank you
>>>> Jeff) advice I found some errors in the script syntax.  I can verify that
>>>> the
>>>> script is accepting the user input, and that that the ³maxval² and ³minval²
>>>> values are correct.
>>>> 
>>>> The first issue is the if statements.  I have a value of minval being -.52
>>>> and 
>>>> still entering the if statement for minval greater than 0.
>>>> 
>>>> Second I am getting an error ³SET error:  Missing or invalid arguments for
>>>> CLEVS 
>>>> option².  I can also verify that the cvals1 through cval8 are being
>>>> calculated, 
>>>> but perhaps I have a syntax error on that line?
>>>> 
>>>> Thank you,
>>>> Darren
>>>> 
>>>> 
>>>> 
>>>> prompt 'Enter EOF #: '
>>>> pull EF
>>>> 
>>>> eofnum = EF
>>>> 
>>>> 'clear'
>>>> 'set poli on'
>>>> 'set ccolor 0'
>>>> 
>>>> 'open 
>>>> /Users/Darren/Desktop/output/MaxT_2x2x1dy_NormByMeanSTD_Afg_1979to2009_1to3
>>>> 65
>>>> _EOF_eof.ctl'
>>>> 
>>>> 'q dims'
>>>> res2 = sublin(result,2)
>>>> res3 = sublin(result,3)
>>>> lon1 = subwrd(res2,6)
>>>> lon2 = subwrd(res2,8)
>>>> lat1 = subwrd(res3,6)
>>>> lat2 = subwrd(res3,8)
>>>> 
>>>> 'set z 'eofnum
>>>> 
>>>> 'maxval = max(max(eof,lon='lon1',lon='lon2'),lat='lat1',lat='lat2')'
>>>> 'minval = min(min(eof,lon='lon1',lon='lon2'),lat='lat1',lat='lat2')'
>>>> 
>>>> * BLUE shades
>>>> 'set rgb 16 0 0 255'
>>>> 'set rgb 17 55 55 255'
>>>> 'set rgb 18 110 110 255'
>>>> 'set rgb 19 165 165 255'
>>>> 'set rgb 20 220 220 255'
>>>> 
>>>> * RED shades
>>>> 'set rgb 21 255 220 220'
>>>> 'set rgb 22 255 165 165'
>>>> 'set rgb 23 255 110 110'
>>>> 'set rgb 24 255 55 55'
>>>> 'set rgb 25 255 0 0'
>>>> 
>>>> 'cval1 = 'minval'/5*4'
>>>> 'cval2 = 'minval'/5*3'
>>>> 'cval3 = 'minval'/5*2'
>>>> 'cval4 = 'minval'/5*1'
>>>> 
>>>> 'cval5 = 'maxval'/5*1'
>>>> 'cval6 = 'maxval'/5*2'
>>>> 'cval7 = 'maxval'/5*3'
>>>> 'cval8 = 'maxval'/5*4'
>>>> 
>>>> if (minval <= 0)
>>>> prompt 'minval greater than 0'
>>>> 'minval = 0'
>>>> 'cval1 = 'maxval'/10*1'
>>>> 'cval2 = 'maxval'/10*2'
>>>> 'cval3 = 'maxval'/10*3'
>>>> 'cval4 = 'maxval'/10*4'
>>>> 'cval5 = 'maxval'/10*5'
>>>> 'cval6 = 'maxval'/10*6'
>>>> 'cval7 = 'maxval'/10*7'
>>>> 'cval8 = 'maxval'/10*8'
>>>> 
>>>> endif
>>>> 
>>>> if (maxval < 0)
>>>> prompt 'maxval less than 0 '
>>>> 'maxval = 0'
>>>> 'cval1 = 'minval'/10*8'
>>>> 'cval2 = 'minval'/10*7'
>>>> 'cval3 = 'minval'/10*6'
>>>> 'cval4 = 'minval'/10*5'
>>>> 'cval5 = 'minval'/10*4'
>>>> 'cval6 = 'minval'/10*3'
>>>> 'cval7 = 'minval'/10*2'
>>>> 'cval8 = 'minval'/10*1'
>>>> 
>>>> endif
>>>> 
>>>> 'set gxout shaded'
>>>> 'set clevs minval cval1 cval2 cval3 cval4 cval5 cval6 cval7 cval8 maxval'
>>>> 'set ccols 16 17 18 19 20 1 21 22 23 24 25'
>>>> 
>>>> 'set mpt * off'
>>>> 'set mpdset hires'
>>>> 'set mpt 0 0 1 7'
>>>> 'set mpt 1 0 1 7'
>>>> 'draw map'
>>>> 
>>>> 'set background 1'
>>>> 'set annot 0 5'
>>>> 'd eof(z='eofnum')'
>>>> 
>>>> 'run /Users/Darren/Desktop/cbarm.gs'
>>>> 
>>>> 
>>>> 'close 1'
>>>>   
>>>>       
>> 
>>   
>