;
; field1='U'
; winds=['V','W']
;

if ( (field1 eq 'U') $
	and (winds(0) eq 'V') $
        and (winds(1) eq 'W')  ) then begin

print, 'computing wind velocity'

title='3D wind velocity (!NN!N.m!U-2!N)'

u=what_I_plot
v=overvector_x
w=overvector_y

velocity2=u^2+v^2+w^2
what_I_plot=sqrt(velocity2)

;;overvector_x=0
;;overvector_y=0

endif