def _add_plots_to_output(out, data):
    """Add CNVkit plots summarizing called copy number values.
    """
    out["plot"] = {}
    diagram_plot = _add_diagram_plot(out, data)
    if diagram_plot:
        out["plot"]["diagram"] = diagram_plot
    scatter = _add_scatter_plot(out, data)
    if scatter:
        out["plot"]["scatter"] = scatter
    scatter_global = _add_global_scatter_plot(out, data)
    if scatter_global:
        out["plot"]["scatter_global"] = scatter_global
    return out