STREAM

    STREAM    lines/arrows/stop/slow/scale
 
    The STREAM parameter controls several parameters dealing with 
    the overall streamline calculation and display.  "Lines" is a 
    real number multiplier which controls the number (density) of 
    streamlines drawn (default 1.0); "arrows" is a real number 
    multiplier which controls the number of arrowheads displayed 
    (default 1.5*lines); "stop" is a real number multiplier which 
    controls how close a streamline comes to another streamline 
    before drawing is discontinued (default 0.5); "slow" is a 
    real number multiplier which controls the minimum vector speed 
    threshold for stopping a streamline (default 0.67); "scale" is 
    a real number multiplier which controls how much the input vector 
    field is scaled prior to streamline calculation (default 0.33).