Re: Re: label the value of a nunmber variable

[Arindam Chakraborty <arch@xxxxxxxxxxxxxx>]

hi Gao,
	please use back-quotes `corr` instead of the forward single 
quotes 'corr' that you've used in your script.



----------------------------
 ARINDAM CHAKRABORTY
 Department of Meteorology
 Florida State University
 Tallahassee, FL-32306, USA
 Tel: +001-850-6443524 (Off)
      +001-850-5758550 (Res)
 Fax: +001-850-6449642
____________________________

On Mon, 3 Jan 2005, [gb2312] ¸ßÈÙÕä wrote:

>  I tried as Arindam told me, but i'm informed as below:
>  
>  %LABEL/nouser 6.1,1.84,-1,0,0.16 ~'corr'
>                                     Symbol not found
> 
> My *.jnl file is :
> 
> set view v11                                                                      
> let cave=coral[d=1,l=1:191@ave]                                                   
> let cdif=coral[d=1,l=1:191]-cave                                                  
> let cdif2=cdif*cdif                                                               
> let csum=cdif2[l=1:191@sum]                                                       
> let sc=(csum/190)^0.5                                                             
> let stdc=cdif/sc                                                                  
> let save=sst[d=2,l=1:191@ave]                                                     
> let sdif=sst[d=2,l=1:191]-save                                                    
> let sdif2=sdif*sdif                                                               
> let ssum=sdif2[l=1:191@sum]                                                       
> let ss=(ssum/190)^0.5                                                             
> let stds=sdif/ss                                                                  
> let a=stdc*stds                                                                   
> let aa=a[l=1:191@sum]                                                             
> let corr=aa/190.                                                                  
>  list corr                                                                        
> go margins ($margin1)                                                             
> GO sst_left  sst[d=2,l=1:191] "SSTa(^oC)"                                         
> GO coral_right coral[d=1,l=1:191] "-100,100,25" "gray value" 0.12 ",,,+1,,(I4)"   
> label/nouser ($rr_pos) ~'corr'                                                    
> let zero=0                                                                        
> let xlev=if(l eq 1)then `($XAXIS_MIN)` else `($XAXIS_MAX)`                        
> let ylev=zero+l-l                                                                 
> plot/o/nolab/line=4/vs/l=1:2 xlev,ylev                                            
> ------------------------------------------------------------
> Ferret version i'm using is 5.53. Can anyone tell me why and how to label value of "corr"?
> 
> 
> 
> 
> hi Gao,
> the value of a scaler variable is obtained by enclosing it in 
> the back-quotes as `variable_name`. Now if you precede this by a ~ 
> character, it'll become a string and you can use it in a label 
> command. Moreover, you can use the font specification symbols @XY 
> where XY is the font type to label the value of that variable.
> Here's one example:
> 
> ! make a sine plot
> plot/x=0:360 sin(x*3.1415/180)
> 
> ! we'll label this variable
> let corr = 12/190
> 
> ! label it, using the default font and precision
> label 250,0.80,0,0,0.13 ~`corr`
> 
> ! now if you want a different font
> label 250,0.70,0,0,0.13 @TR`corr`
> 
> ! and the precision as per your need
> label 250,0.60,0,0,0.13 @TR`corr,p=-3` !p=-3 means the user wants 3 
> digits after the decimal point.
> 
> For more details about font control, look at
> http://ferret.wrc.noaa.gov/Ferret/Documentation/Users_Guide/current/Chapter6_Customizing_Plots.htm#_VPINDEXENTRY_762
> 
> or precision control, look at
> 
> http://ferret.wrc.noaa.gov/Ferret/Documentation/Users_Guide/current/Chapter3_Variables_and_Expressions.htm#_VPINDEXENTRY_517
> 
> or label command, look at
> 
> http://ferret.wrc.noaa.gov/Ferret/Documentation/Users_Guide/current/Chapter6_Customizing_Plots.htm#_VPINDEXENTRY_721
> 
> 
> ----------------------------
>  ARINDAM CHAKRABORTY
>  Department of Meteorology
>  Florida State University
>  Tallahassee, FL-32306, USA
>  Tel: +001-850-6443524 (Off)
>       +001-850-5758550 (Res)
>  Fax: +001-850-6449642
> ____________________________
> 
> On Sat, 1 Jan 2005, [gb2312] ¸ßÈÙÕä wrote:
> 
> >  Hi, All
> >  
> >  My problem this time is how to label the value of a nunmber variable on the plot?
> >  
> >  For example:
> >    let corr=12/190.
> >   
> >  Now, i want to label the value of corr, and how can i achieve it?  Thanks!
> >  
> >  Gao Rongzhen
> >  
>