Function plot

include/matplotlibcpp.h:405–434

/// See: https://matplotlib.org/3.2.1/api/_as_gen/matplotlib.pyplot.plot.html
template<typename Numeric>
bool plot(const std::vector<Numeric> &x, const std::vector<Numeric> &y, const std::map<std::string, std::string>& keywords)
{
    assert(x.size() == y.size());

    detail::_interpreter::get();

    // using numpy arrays
    PyObject* xarray = detail::get_array(x);
    PyObject* yarray = detail::get_array(y);

    // construct positional args
    PyObject* args = PyTuple_New(2);
    PyTuple_SetItem(args, 0, xarray);
    PyTuple_SetItem(args, 1, yarray);

    // construct keyword args
    PyObject* kwargs = PyDict_New();
    for(std::map<std::string, std::string>::const_iterator it = keywords.begin(); it != keywords.end(); ++it)
    {
        PyDict_SetItemString(kwargs, it->first.c_str(), PyString_FromString(it->second.c_str()));
    }

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

    Py_DECREF(args);
    Py_DECREF(kwargs);
    if(res) Py_DECREF(res);

    return res;
}

// TODO - it should be possible to make this work by implementing
// a non-numpy alternative for `detail::get_2darray()`.