qiskit/visualization/bloch.py
def plot_vectors(self):
        """Plot vector"""
        # -X and Y data are switched for plotting purposes
        for k in range(len(self.vectors)):

            xs3d = self.vectors[k][1] * np.array([0, 1])
            ys3d = -self.vectors[k][0] * np.array([0, 1])
            zs3d = self.vectors[k][2] * np.array([0, 1])

            color = self.vector_color[np.mod(k, len(self.vector_color))]

            if self.vector_style == '':
                # simple line style
                self.axes.plot(xs3d, ys3d, zs3d,
                               zs=0, zdir='z', label='Z',
                               lw=self.vector_width, color=color)
            else:
                # decorated style, with arrow heads
                arr = Arrow3D(xs3d, ys3d, zs3d,
                              mutation_scale=self.vector_mutation,
                              lw=self.vector_width,
                              arrowstyle=self.vector_style,
                              color=color)

                self.axes.add_artist(arr)
def plot_vectors(self):
        """Plot vector"""
        # -X and Y data are switched for plotting purposes
        for k in range(len(self.vectors)):

            xs3d = self.vectors[k][1] * np.array([0, 1])
            ys3d = -self.vectors[k][0] * np.array([0, 1])
            zs3d = self.vectors[k][2] * np.array([0, 1])

            color = self.vector_color[np.mod(k, len(self.vector_color))]

            if self.vector_style == '':
                # simple line style
                self.axes.plot(xs3d, ys3d, zs3d,
                               zs=0, zdir='z', label='Z',
                               lw=self.vector_width, color=color)
            else:
                # decorated style, with arrow heads
                arr = Arrow3D(xs3d, ys3d, zs3d,
                              mutation_scale=self.vector_mutation,
                              lw=self.vector_width,
                              arrowstyle=self.vector_style,
                              color=color)

                self.axes.add_artist(arr)
Plot vector