how to use colorbar?

[gaopeng-nreal]

Thanks a lot for your work, I'm new to c++ and ran into this problem. When I draw a heat map, using colorbar, I get an error like this： what(): Must call colorbar with PyObject* returned from an image, contour, surface, etc.

this is my code： matplotlibcpp::imshow((float*)a,20,27,1); matplotlibcpp::colorbar(); matplotlibcpp::show();

[gaopeng-nreal]

solved PyObject* mat; matplotlibcpp::imshow((float*)a,20,27,1,{},&mat); matplotlibcpp::colorbar(mat);