Method legend_string

source/matplot/axes_objects/histogram.cpp:83–87

    }

    std::string histogram::legend_string(std::string_view title) {
        return " keyentry with boxes fillstyle solid border rgb '" +
               to_string(edge_color_) + "' fillcolor '" +
               to_string(face_color_) + "' title \"" + escape(title) + "\"";
    }

    std::string histogram::data_string() {
        make_sure_data_is_preprocessed();