贴吧大佬们，问多元非线性拟合，情况如下我有一组数据，共两个自

张翔10

贴吧大佬们，问多元非线性拟合，情况如下
我有一组数据，共两个自变量，一个因变量，现已分别拟合出单变量对自变量的函数模型，效果都很好R近于1，如下：
1. f = a*exp(-b*x1)
2. f = x2/(a-b*x2)
现在我想将x1与x2一起对y进行拟合，x1与x2两者之间无拟合模型，无法使用函数关系进行转换，
求问我该如何进行x1,x2共同对y的拟合？
求大佬指点指点，教教我怎么做。
感激涕零，无以为表！

MC夜雨冷风

私信说情况。

QQ1641085143

有数据吗？先贴出来看一看。

xiaozhubanna

0.16552,0.19099,67.5
0.35651,0.45837,65.5
0.45837,0.62389,65.5
0.35651,0.45837,65.5
0.44563,0.62389,65.5
0.14006,0.12732,72.5
0.19099,0.11459,66
0.11459,0.10186,70
0.05093,0.05093,75
0.11459,0.11459,70
0.11459,0.063662,70
0.025465,0.012732,75
0.11459,0.10186,70
0.11459,0.063662,70
0.012732,0.025465,75
0.063662,0.076394,75
0.10186,0.20372,70
0.05093,0.063662,69.5
0.11459,0.063662,70
0.14006,0.076394,70.5
0.038197,0.038197,68
0.14006,0.24192,66.5
0.15279,0.10186,67.5
0.14006,0.21645,67
0.11459,0.089127,70
0.12732,0.19099,66.5
0.10186,0.10186,75
0.29285,0.45837,66.5
0.05093,0.05093,71.5
0.012732,0.05093,73
0.063662,0.025465,73.5
0.012732,0.025465,75
0.11459,0.05093,70
0.076394,0.063662,73.5
0.10186,0.20372,70
0.21645,0.3947,66
0.063662,0.063662,73
0.30558,0.49656,66.5
0.063662,0.076394,75
0.24192,0.42017,66.5
0.31831,0.48383,66.5
0.11459,0.089127,70
0.17825,0.11459,66
0.24192,0.22918,67.5
0.33104,0.5093,65.5
0.063662,0.063662,73.5
0.24192,0.22918,67.5
0.025465,0.089127,72.5
0.36924,0.54749,66
0.3947,0.56023,65.5
0.063662,0.038197,70
0.14006,0.05093,73
0.20372,0.40744,68
0.012732,0,75
0.3947,0.56023,65.5
0.40744,0.42017,67
0.063662,0.063662,73
0.35651,0.44563,65
0.42017,0.42017,66
0.42017,0.42017,66
0.025465,0.012732,75
0.30558,0.25465,66
0.10186,0.15279,72.5
0.45837,0.56023,65
0.45837,0.54749,65.5
0.20372,0.19099,66.5
0.30558,0.25465,66
0.22918,0.17825,66
0.44563,0.63662,65.5
0.34377,0.52203,66
0.20372,0.16552,68
0.38197,0.54749,66
0.45837,0.54749,65.5
0.21645,0.17825,66
0.38197,0.49656,66
0.45837,0.57296,65.5
0.21645,0.17825,67
0.48383,0.57296,65.5
0.36924,0.36924,66
0.28011,0.4711,66
0.31831,0.44563,65.5
0.063662,0.15279,70.5
0.063662,0.038197,70
0.025465,0.076394,70.5
0.089127,0.089127,68
0.089127,0.076394,74
0.038197,0.063662,71.5
0.063662,0.11459,75
0.063662,0.11459,75
0.038197,0.012732,75
0.36924,0.36924,65.5
0.15279,0.11459,72.5
0.038197,0.012732,75
0.16552,0.089127,68
0.063662,0.063662,70
0.16552,0.089127,68
0.063662,0.089127,70
0.063662,0.076394,72.5
0.025465,0.038197,70
0.063662,0.15279,70.5
0.16552,0.15279,70
0.089127,0.089127,68.5
0.10186,0.20372,70
0.16552,0.11459,67.5
0.063662,0.063662,71
0.11459,0.16552,67
0.19099,0.12732,72
0.15279,0.10186,68
0.17825,0.11459,66
0.16552,0.10186,66.5
0.16552,0.15279,70
0.17825,0.12732,66.5
0.012732,0.038197,72.5
0.05093,0.063662,75
0.063662,0.063662,71
0.15279,0.11459,68
0.45837,0.56023,65.5
0.05093,0.089127,68
0.33104,0.38197,66.5
0.10186,0.089127,69.5
0.063662,0.076394,72.5
0.15279,0.05093,73
0.19099,0.11459,66
0.025465,0.05093,75
0.038197,0.012732,75
0.038197,0.063662,75
0.076394,0.063662,72
0.025465,0.012732,75
0.16552,0.22918,85
0.15279,0.24192,80
0.012732,0.025465,75
0.063662,0.063662,72
0.14006,0.10186,85
0.063662,0.063662,85
0.05093,0.076394,80
0.025465,0.038197,70
0.16552,0.21645,68
0.11459,0.05093,80
0.05093,0.063662,85
0.16552,0.21645,85
0.038197,0.063662,85
0.20372,0.11459,85
0.33104,0.38197,66.5
0.15279,0.24192,85
0.05093,0.063662,85
0.025465,0.05093,70
0.15279,0.12732,85
0.076394,0.089127,85
0.05093,0.076394,85
0.15279,0.10186,67.5
0.15279,0.14006,85
0.20372,0.11459,72
0.15279,0.12732,85
0.025465,0.038197,72
0.21645,0.15279,72
0.17825,0.14006,72
0.14006,0.14006,72
0.063662,0.12732,74
0.15279,0.12732,80
0.14006,0.14006,72
0.12732,0.12732,72
0.20372,0.11459,72
0.19099,0.15279,72
0.36924,0.36924,72
0.012732,0.025465,74
0.40744,0.44563,72
0.20372,0.15279,72
0.20372,0.29285,72
0.063662,0.05093,72
0.12732,0.16552,72
0.25465,0.4711,65.5
0.11459,0.11459,80
0.20372,0.22918,85
0.42017,0.57296,65.5
0.17825,0.089127,72
0.14006,0.11459,85

F1F2F3

有人会这个吗？