[R-sig-Geo] plot streamlines from codar data

[Roger Bivand]

On Thu, 12 Oct 2006, massimodisasha wrote:

> hi, i'm tring to plot a streamline my set of data is like this :
> 
There is not enough information here to say what you want to know. You 
have not told us the metrics of the columns (not everyone works in your 
field), nor how individual streamlines are defined (one row, many rows?). 
For each group of four rows, dx and lon are fixed and dy replicates.

> Vectors: dx dy                            u              
> v                              lat                  lon
> 
>    -6.25000     -2.50000         1.717      -7.092                  
> 40.644167     14.092523
>    -6.25000     -1.25000         1.631      -9.520                  
> 40.655418     14.092523
>    -6.25000      0.00000         1.251     -12.137                 
> 40.666667     14.092523
>    -6.25000      1.25000         0.313     -12.531                 
> 40.677914     14.092523
>    -5.00000     -2.50000         2.789      -4.769                  
> 40.644167     14.107351
>    -5.00000     -1.25000         1.593      -7.360                  
> 40.655418     14.107351
>    -5.00000      0.00000         1.259      -9.956                  
> 40.666667     14.107351
>    -5.00000      1.25000        -0.763     -17.315                
> 40.677914     14.107351
> ......
> ........
> 
> 
> 
> i'm studing a metod for visualize this data  any suggestion is more  
> apprechated!
>   thanks
> Massimo
> 
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-- 
Roger Bivand
Economic Geography Section, Department of Economics, Norwegian School of
Economics and Business Administration, Helleveien 30, N-5045 Bergen,
Norway. voice: +47 55 95 93 55; fax +47 55 95 95 43
e-mail: Roger.Bivand at nhh.no