Class Plot

include/matplotlibcpp.h:2400–2497

* This class allows dynamic plots, ie changing the plotted data without clearing and re-plotting */

 * This class allows dynamic plots, ie changing the plotted data without clearing and re-plotting
 */
class Plot
{
public:
    // default initialization with plot label, some data and format
    template<typename Numeric>
    Plot(const std::string& name, const std::vector<Numeric>& x, const std::vector<Numeric>& y, const std::string& format = "") {
        detail::_interpreter::get();

        assert(x.size() == y.size());

        PyObject* kwargs = PyDict_New();
        if(name != "")
            PyDict_SetItemString(kwargs, "label", PyString_FromString(name.c_str()));

        PyObject* xarray = detail::get_array(x);
        PyObject* yarray = detail::get_array(y);

        PyObject* pystring = PyString_FromString(format.c_str());

        PyObject* plot_args = PyTuple_New(3);
        PyTuple_SetItem(plot_args, 0, xarray);
        PyTuple_SetItem(plot_args, 1, yarray);
        PyTuple_SetItem(plot_args, 2, pystring);

        PyObject* res = PyObject_Call(detail::_interpreter::get().s_python_function_plot, plot_args, kwargs);

        Py_DECREF(kwargs);
        Py_DECREF(plot_args);

        if(res)
        {
            line= PyList_GetItem(res, 0);

            if(line)
                set_data_fct = PyObject_GetAttrString(line,"set_data");
            else
                Py_DECREF(line);
            Py_DECREF(res);
        }
    }

    // shorter initialization with name or format only
    // basically calls line, = plot([], [])
    Plot(const std::string& name = "", const std::string& format = "")
        : Plot(name, std::vector<double>(), std::vector<double>(), format) {}

    template<typename Numeric>
    bool update(const std::vector<Numeric>& x, const std::vector<Numeric>& y) {
        assert(x.size() == y.size());
        if(set_data_fct)
        {
            PyObject* xarray = detail::get_array(x);
            PyObject* yarray = detail::get_array(y);

            PyObject* plot_args = PyTuple_New(2);
            PyTuple_SetItem(plot_args, 0, xarray);
            PyTuple_SetItem(plot_args, 1, yarray);