本代码为灰色预测模型和数学建模中最为经典的规划问题的代码及例题说明，不管是数学建模还是在日常工作中的规划预测类问题，都能用到。(The code for the gray prediction model and mathematical modeling of the most classic planning problems of the code and examples of instructions, whether it is mathematical modeling, or in the daily work of planning, forecasting, class problems can be used.)