qiskit/visualization/state_visualization.py
def plot_bloch_vector(bloch, title="", ax=None, figsize=None):
    """Plot the Bloch sphere.

    Plot a sphere, axes, the Bloch vector, and its projections onto each axis.

    Args:
        bloch (list[double]): array of three elements where [<x>, <y>, <z>]
        title (str): a string that represents the plot title
        ax (matplotlib.Axes): An Axes to use for rendering the bloch sphere
        figsize (tuple): Figure size in inches. Has no effect is passing `ax`.

    Returns:
        Figure: A matplotlib figure instance if `ax = None`.

    Raises:
        ImportError: Requires matplotlib.
    """
    if not HAS_MATPLOTLIB:
        raise ImportError('Must have Matplotlib installed.')
    if figsize is None:
        figsize = (5, 5)
    B = Bloch(axes=ax)
    B.add_vectors(bloch)
    B.render(title=title)
    if ax is None:
        fig = B.fig
        fig.set_size_inches(figsize[0], figsize[1])
        plt.close(fig)
        return fig
    return None
def plot_bloch_vector(bloch, title="", ax=None, figsize=None):
    """Plot the Bloch sphere.

    Plot a sphere, axes, the Bloch vector, and its projections onto each axis.

    Args:
        bloch (list[double]): array of three elements where [<x>, <y>, <z>]
        title (str): a string that represents the plot title
        ax (matplotlib.Axes): An Axes to use for rendering the bloch sphere
        figsize (tuple): Figure size in inches. Has no effect is passing `ax`.

    Returns:
        Figure: A matplotlib figure instance if `ax = None`.

    Raises:
        ImportError: Requires matplotlib.
    """
    if not HAS_MATPLOTLIB:
        raise ImportError('Must have Matplotlib installed.')
    if figsize is None:
        figsize = (5, 5)
    B = Bloch(axes=ax)
    B.add_vectors(bloch)
    B.render(title=title)
    if ax is None:
        fig = B.fig
        fig.set_size_inches(figsize[0], figsize[1])
        plt.close(fig)
        return fig
    return None
Plot the Bloch sphere.

    Plot a sphere, axes, the Bloch vector, and its projections onto each axis.

    Args:
        bloch (list[double]): array of three elements where [<x>, <y>, <z>]
        title (str): a string that represents the plot title
        ax (matplotlib.Axes): An Axes to use for rendering the bloch sphere
        figsize (tuple): Figure size in inches. Has no effect is passing `ax`.

    Returns:
        Figure: A matplotlib figure instance if `ax = None`.

    Raises:
        ImportError: Requires matplotlib.