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

[massimodisasha]

hi, i'm tring to plot a streamline my set of data is like this :

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