About cannot plot the Residuals_predicted figure

[KYRA-ma]

Dear @lululxvi ,

Recently I have been watching the course which u have given lessons in Tianyuan Mathematical Centre, and I just installed the deepxde, and run the project fnn_pde in the https://github.com/lululxvi/tutorials/tree/master/20211208_deep_learning_handson but i only got two figures and the third figure u have mentioned in the video is missing. I don't know how to fix it. Could you provide some help for me, since I'm completely new to it. Hope for your apply. 老师您好，最近在看您在国家天元东南中心开的课程，跟着老师您的步骤，我安装了deepxde，并且运行了您的程序，但发现我run出来的图片只有两张，不知道问题出现哪里～请求老师解答