def barbs(self, *args, **kwargs):
"""
Plot a 2-D field of barbs in a map.
:param x: (*array_like*) Optional. X coordinate array.
:param y: (*array_like*) Optional. Y coordinate array.
:param u: (*array_like*) U component of the arrow vectors (wind field) or wind direction.
:param v: (*array_like*) V component of the arrow vectors (wind field) or wind speed.
:param z: (*array_like*) Optional, 2-D z value array.
:param levs: (*array_like*) Optional. A list of floating point numbers indicating the level
barbs to draw, in increasing order.
:param cmap: (*string*) Color map string.
:param fill_value: (*float*) Fill_value. Default is ``-9999.0``.
:param isuv: (*boolean*) Is U/V or direction/speed data array pairs. Default is True.
:param size: (*float*) Base size of the arrows.
:param proj: (*ProjectionInfo*) Map projection of the data. Default is None.
:param zorder: (*int*) Z-order of created layer for display.
:param select: (*boolean*) Set the return layer as selected layer or not.
:returns: (*VectoryLayer*) Created barbs VectoryLayer.
"""
cmap = plotutil.getcolormap(**kwargs)
fill_value = kwargs.pop('fill_value', -9999.0)
proj = kwargs.pop('proj', None)
order = kwargs.pop('order', None)
isuv = kwargs.pop('isuv', True)
n = len(args)
iscolor = False
cdata = None
onlyuv = True
if n >= 4 and isinstance(args[3], (DimArray, MIArray)):
onlyuv = False
if onlyuv:
u = minum.asarray(args[0])
v = minum.asarray(args[1])
xx = args[0].dimvalue(1)
yy = args[0].dimvalue(0)
x, y = minum.meshgrid(xx, yy)
args = args[2:]
if len(args) > 0:
cdata = minum.asarray(args[0])
iscolor = True
args = args[1:]
else:
x = minum.asarray(args[0])
y = minum.asarray(args[1])
u = minum.asarray(args[2])
v = minum.asarray(args[3])
args = args[4:]
if len(args) > 0:
cdata = minum.asarray(args[0])
iscolor = True
args = args[1:]
if iscolor:
if len(args) > 0:
cn = args[0]
ls = LegendManage.createLegendScheme(cdata.min(), cdata.max(), cn, cmap)
else:
levs = kwargs.pop('levs', None)
if levs is None:
ls = LegendManage.createLegendScheme(cdata.min(), cdata.max(), cmap)
else:
if isinstance(levs, MIArray):
levs = levs.tolist()
ls = LegendManage.createLegendScheme(cdata.min(), cdata.max(), levs, cmap)
else:
if cmap.getColorCount() == 1:
c = cmap.getColor(0)
else:
c = Color.black
ls = LegendManage.createSingleSymbolLegendScheme(ShapeTypes.Point, c, 10)
ls = plotutil.setlegendscheme_point(ls, **kwargs)
if not cdata is None:
cdata = cdata.array
layer = DrawMeteoData.createBarbLayer(x.array, y.array, u.array, v.array, cdata, ls, 'layer', isuv)
if not proj is None:
layer.setProjInfo(proj)
# Add layer
isadd = kwargs.pop('isadd', True)
if isadd:
zorder = kwargs.pop('zorder', None)
select = kwargs.pop('select', True)
self.add_layer(layer, zorder, select)
self.axes.setDrawExtent(layer.getExtent().clone())
self.axes.setExtent(layer.getExtent().clone())
return MILayer(layer)
