Method legend_string

source/matplot/axes_objects/surface.cpp:344–349

    }

    std::string surface::legend_string(std::string_view title) {
        return " keyentry " +
               line_spec_.plot_string(
                   line_spec::style_to_plot::plot_line_only) +
               " title \"" + escape(title) + "\"";
    }

    std::string surface::grid_data_string() {
        std::stringstream ss;