伙计们，
我不知道为什么我会收到来自Mathematica的以下代码的警告消息：
代码语言：javascript复制data = {{0, 1}, {1, 0.02307044673005989`}, {2,
0.00784879347316981`}, {3, 0.0061305265946403195`}, {4,
0.0008550610216054799`}, {5, 0.00010928133254420425`}, {6,
0.000011431049984759768`}, {7, 1.93788101788827`*^-6}, {8,
1.6278670621771263`*^-6}, {9, 2.6661469926370584`*^-7}, {10,
3.443821224260662`*^-8}, {11, 7.413060538191399`*^-9}, {12,
1.4031525687948224`*^-9}, {13, 5.973790450062338`*^-10}, {14,
1.7434844383850214`*^-10}, {15, 2.6053424128998922`*^-11}, {16,
9.887095524831592`*^-12}, {17, 1.2318024865446659`*^-12}, {18,
2.2125640342387203`*^-13}, {19, 1.3176590670511745`*^-13}, {20,
2.7354393146500743`*^-14}};
fit = NonlinearModelFit[data, a + b Exp[-x/c], {a, b, c}, x,
MaxIterations -> \[Infinity], PrecisionGoal -> MachinePrecision,
WorkingPrecision -> MachinePrecision];
fit["BestFitParameters"] (* THE WARNING APPEARS AFTER CALLING THIS FUNCTION *)警告信息是：
FittedModel:参数函数(MachinePrecision)的精度低于WorkingPrecision (MachinePrecision)。
提前谢谢。