Re: Re: label the value of a nunmber variable

["=?gb2312?B?uN/I2dXk?=" <gaorz@xxxxxxxxxxx>]

 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] ������ 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

>  

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