Feathers

uv = [0.0 0 2.0; 0.0 30 2; 0.0 60 2; 0.0 90 2; 0.0 120 2; 0.0 150 2; 0.0 180 2; 0.0 210 2; 0.0 240 2; 0.0 270 2; 0.0 300 2; 0.0 330 2; 0.0 360 2]

using GMT
uv = [0.0 0 2.0; 0.0 30 2; 0.0 60 2; 0.0 90 2; 0.0 120 2; 0.0 150 2; 0.0 180 2; 0.0 210 2; 0.0 240 2; 0.0 270 2; 0.0 300 2; 0.0 330 2; 0.0 360 2];
feather(uv, rtheta=true, aspect="1:1", arrow=(len=0.5, shape=0.5,),
        lw=0.5, fill=:green, show=true)

Simple arrows and in function of number of arrows.

using GMT
t = -pi/2:pi/8:pi/2; u = 10*sin.(t); v = 10*cos.(t);
feather(u,v, show=true)

Show the data used in this example.

D = gmtread(getpath4docs("wind_faro_s.dat"))

Create a winbarb plot. Note that since the data has 4 columns we must select the 3 that we want to use in the plot. We select the columns from teir names in the DGMTdataset.

using GMT
feather(getpath4docs("wind_faro.dat"), xvar=:Time, yvar=[:azimuth, :vmean],
        rtheta=true, nohead=1, lw=0.1, show=true)