matplotlib.axes.Axes.quiverkey
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Axes.quiverkey(self, Q, X, Y, U, label, **kw)[source]
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Add a key to a quiver plot. The positioning of the key depends on X, Y, coordinates, and labelpos. If labelpos is 'N' or 'S', X, Y give the position of the middle of the key arrow. If labelpos is 'E', X, Y positions the head, and if labelpos is 'W', X, Y positions the tail; in either of these two cases, X, Y is somewhere in the middle of the arrow+label key object. Parameters: - 
Qmatplotlib.quiver.Quiver
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X, Yfloat
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The location of the key. 
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Ufloat
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The length of the key. 
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labelstr
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The key label (e.g., length and units of the key). 
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anglefloat, default: 0
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The angle of the key arrow, in degrees anti-clockwise from the x-axis. 
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coordinates{'axes', 'figure', 'data', 'inches'}, default: 'axes'
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Coordinate system and units for X, Y: 'axes' and 'figure' are normalized coordinate systems with (0, 0) in the lower left and (1, 1) in the upper right; 'data' are the axes data coordinates (used for the locations of the vectors in the quiver plot itself); 'inches' is position in the figure in inches, with (0, 0) at the lower left corner. 
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colorcolor
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Overrides face and edge colors from Q. 
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labelpos{'N', 'S', 'E', 'W'}
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Position the label above, below, to the right, to the left of the arrow, respectively. 
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labelsepfloat, default: 0.1
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Distance in inches between the arrow and the label. 
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labelcolorcolor, default: rcParams["text.color"] (default: 'black')
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Label color. 
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fontpropertiesdict, optional
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A dictionary with keyword arguments accepted by the FontPropertiesinitializer: family, style, variant, size, weight.
- **kwargs
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Any additional keyword arguments are used to override vector properties taken from Q. 
 
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Examples using matplotlib.axes.Axes.quiverkey
 
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Licensed under the Matplotlib License Agreement.
    https://matplotlib.org/3.3.3/api/_as_gen/matplotlib.axes.Axes.quiverkey.html