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quiverm

mipylib.plotlib.miplot.quiverm(*args, **kwargs)

Plot a 2-D field of arrows in a map.

Parameters:
  • x – (array_like) Optional. X coordinate array.
  • y – (array_like) Optional. Y coordinate array.
  • u – (array_like) U component of the arrow vectors (wind field) or wind direction.
  • v – (array_like) V component of the arrow vectors (wind field) or wind speed.
  • z – (array_like) Optional, 2-D z value array.
  • cmap – (string) Color map string.
  • fill_value – (float) Fill_value. Default is -9999.0.
  • isuv – (boolean) Is U/V or direction/speed data array pairs. Default is True.
  • size – (float) Base size of the arrows.
  • proj – (ProjectionInfo) Map projection of the data. Default is None.
  • order – (int) Z-order of created layer for display.
Returns:

(VectoryLayer) Created quiver VectoryLayer.

Example:

f = addfile('D:/Temp/GrADS/model.ctl')
u = f['U'][0,'500','10:60','60:140']
v = f['V'][0,'500','10:60','60:140']
speed = sqrt(u*u+v*v)
#Plot
axesm()
lworld = shaperead('D:/Temp/Map/country1.shp')
geoshow(lworld)
layer = quiverm(u, v, speed, 10, size=8)
quiverkey(layer, 0.74, 0.18, 15, bbox={'edge':True, 'fill':True})
colorbar(layer)
title('Wind field')
yticks([20,40,60])
../../../../_images/vector2.png