[gradsusr] (no subject)

[dzengiz.tafa at telenet.be]

Hi 

Try to use the variable, followed with a ".#", where # stands for the filenumber thats assigned. 
Starting eg from what you have... 

'sdfopen mslp.nc ' 
'sdfopen t1000.nc ' 
'define mslp=ave(pressure,t=1,t=420,12)' 
'd mslp' 
'c' 
'define tmp=ave(temp-273.15,t=1,t=420,12)' 
'd tmp' 

The first sdfopen creates file number 1 & the second creates file number 2 

When using the variables you can add a ".", followed by the filename so 
'define mslp=ave(pressure,t=1,t=420,12)' becomes 
'define mslp=ave(pressure.1,t=1,t=420,12)' 
and 
'define tmp=ave(temp-273.15,t=1,t=420,12)' becomes 
'define tmp=ave(temp.2-273.15,t=1,t=420,12)' 

If for some reason this does not work, just add a 'set dfile #' (#=filenumber) before handling the vars 

The whole solution then becomes 

'sdfopen mslp.nc ' 
'sdfopen t1000.nc ' 
'set stdfile 1' 
'define mslp=ave(pressure.1,t=1,t=420,12)' 
'd mslp' 
'c' 
'set stdfile 2' 
'define tmp=ave(temp.2-273.15,t=1,t=420,12)' 
'd tmp' 

Good luck. 

----- Oorspronkelijk bericht -----

Van: "Gargi Akhoury" <gargiakhoury at bitmesra.ac.in> 
Aan: "GrADS Users Forum" <gradsusr at gradsusr.org> 
Verzonden: Dinsdag 22 maart 2016 13:53:08 
Onderwerp: Re: [gradsusr] (no subject) 

Hello, 
I have tried but I am getting this error: 

Data Request Warning: Request is completely outside file limits 
Entire grid contents are set to missing data 
Grid limits of file: X = 1 144 Y = 1 73 Z = 1 1 T = 1 780 E = 1 1 
Grid limits of request: X = 1 145 Y = 1 73 Z = -999 -999 T = 1 1 E = 1 1 
Warning issued for variable = temp.2 
Data Request Warning: Request is completely outside file limits 
Entire grid contents are set to missing data 
Grid limits of file: X = 1 144 Y = 1 73 Z = 1 1 T = 1 780 E = 1 1 
Grid limits of request: X = 1 145 Y = 1 73 Z = -999 -999 T = 13 13 E = 1 1 
Warning issued for variable = temp.2 
Data Request Warning: Request is completely outside file limits 
Entire grid contents are set to missing data 
Grid limits of file: X = 1 144 Y = 1 73 Z = 1 1 T = 1 780 E = 1 1 
Grid limits of request: X = 1 145 Y = 1 73 Z = -999 -999 T = 25 25 E = 1 ....................................... 

Regards 

On Tue, Mar 22, 2016 at 4:41 PM, Thomas Davies < tsd.davies at gmail.com > wrote: 




You need to 'set dfile 2' after opening the second file and then define the variable. Or define it as temp.2 to reference the second file 
On Tue, 22 Mar 2016 09:38 Gargi Akhoury, < gargiakhoury at bitmesra.ac.in > wrote: 

<blockquote>

Dear Grads Users, 
It's a very simple problem but I am facing problem to solve this. 
I have two netcdf files like: 
temp.nc 
mslp.nc 

I want to open these two files together and display the image. I have done it like this. 

'sdfopen mslp.nc ' 
'sdfopen t1000.nc ' 
'define mslp=ave(pressure,t=1,t=420,12)' 
'd mslp' 
'c' 
'define tmp=ave(temp-273.15,t=1,t=420,12)' 
'd tmp' 

But I am getting error in this. The error is: 

"define tmp=ave(temp-273.15,t=1,t=420,12) 
Averaging. dim = 3, start = 1, end = 420 
Syntax Error: Invalid Operand 
'temp' not a variable or function name 
Operation Error: Error from ave function 
Error ocurred at column 1 
DEFINE error: Invalid expression." 

Kindly, help me regarding this. 

Kind Regards 
Gargi 



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</blockquote>



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