This function is inspired from vfield; I tried to overcome some problems that I found using the other one and to improve the visualization of the vectors of the field. Furthermore the visualization is CFD style.

The visualization is very quick, also with large vector fields.

The function reads matrix x,y positions and u,v vectors components. All input must have same dimensions.

The dimension of plotted vector is proportional to vector length, and the color is same.

You can specify two options 'scale' and the value of che scale factor enlarging vector visualization 'lungh' and you have all vector of normalized length .