![]() ![]() There's an annoying name space problem that I could only fix by (hackily) using a global variable. Label.update_positions()įig.canvas.mpl_connect('motion_notify_event', update_position) X2, y2, _ = proj3d.proj_transform(x, y, z, ax.get_proj()) Labels_and_points.append((label, x, y, z)) Textcoords = 'offset points', ha = 'right', va = 'bottom', ![]() # sure why update_positions() doesn't get accessįor txt, x, y, z in zip(labels, xs, ys, zs): # we must use a predefined global variable so that # if this code is placed inside a function, then It works for any list of points and labels. Here's a slightly more general form of HYRY's excellent answer. Shows text annotation over data point closest to mouse."""ĬlosestIndex = calcClosestDatapoint(X, event)įig.canvas.mpl_connect('motion_notify_event', onMouseMotion) # on mouse motion """Event that is triggered when mouse is moved. Xy = (x2, y2), xytext = (-20, 20), textcoords = 'offset points', ha = 'right', va = 'bottom',ībox = dict(boxstyle = 'round,pad=0.5', fc = 'yellow', alpha = 0.5),Īrrowprops = dict(arrowstyle = '->', connectionstyle = 'arc3,rad=0')) X2, y2, _ = proj3d.proj_transform(X, X, X, ax.get_proj())ĪnnotatePlot.label = plt.annotate( "Value %d" % index, # Get data point from array of points X, at position index # If we have previously displayed another label, remove it first Index (int) - index (into points array X) of item which should be printed SmallestIndex (int) - the index (into the array of points X) of the element closest to the mouse positionĭistances =, event) for i in range(X.shape)] """"Calculate which data point is closest to the mouse position.Įvent (MouseEvent) - mouse event (containing mouse position) # Convert 2d data space to 2d screen space X2, y2, _ = proj3d.proj_transform(point, point, point, plt.gca().get_proj()) xdata)ĭistance (np.float64): distance (in screen coords) between mouse pos and data pointĪssert point.shape = (3,), "distance: point.shape is wrong: %s, must be (3,)" % point.shape Point (np.array): np.array of shape (3,), with x,y,z in data coordsĮvent (MouseEvent): mouse event (which contains mouse position in. """Return distance between mouse position and given data point X (np.array) - array of points, of shape (numPoints, 3)Īx = fig.add_subplot(111, projection = '3d')Īx.scatter(X, X, X, depthshade = False, picker = True) """Visualize data in 3d plot with popover next to mouse position. Import matplotlib.pyplot as plt, numpy as np After every mouse movement, the distance of the mouse pointer to all data points is calculated, and the closest point is annotated. Only the data point next to your mouse position will be annotated. The following solution (built on top of HYRY's answer) implements a mouse-over (pop-over) solution for data points in 3d charts. If you have many data points, the chart can get very cluttered if you annotate them all. ![]() Textcoords='offset points', ha='right',va='bottom') Segments =, xyzn) for s, t in edges]Īx.scatter(xn,yn,zn, marker='o', c = group, s = 64)Įdge_col = Line3DCollection(segments, lw=0.2)Īnnotate3D(ax, s=str(j), xyz=xyz_, fontsize=10, xytext=(-3,3), Using this function annotation tags can be added to Axes3d as in example bellow:įrom mpl_3d import Line3DCollection '''add anotation text s to to Axes3d ax''' Xs, ys, zs = proj_transform(xs3d, ys3d, zs3d, renderer.M)įurther, we can define the annotate3D() function: def annotate3D(ax, s, *args, **kwargs): Similarly Annotation3D class (inherited from Annotation) can be created: from mpl_3d import proj_transformĭef _init_(self, s, xyz, *args, **kwargs):Īnnotation._init_(self,s, xy=(0,0), *args, **kwargs) In the following posts, the plotting of 3D arrows in matplotlib is discussed. ![]()
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