mathematica非线性拟合问题date={{1990, 632.98}, {1991, 702.15}, {1992, 809.94}, {1993, 973.35}, {1994, 1147.37}, {1995, 1289.96}, {1996, 1389.75}, {1997, 1577.45}, {1998, 1742.95}, {1999, 1986.82}, {2000, 2234.24}, {2001, 2572.82}, {200

来源：学生作业帮助网 编辑：作业帮 时间：2024/11/17 15:32:21
mathematica非线性拟合问题date={{1990, 632.98}, {1991, 702.15}, {1992, 809.94}, {1993, 973.35}, {1994, 1147.37}, {1995, 1289.96}, {1996, 1389.75}, {1997, 1577.45}, {1998, 1742.95}, {1999, 1986.82}, {2000, 2234.24}, {2001, 2572.82}, {200
xj@_e6YCJTɭyCqu(CBKH)!IK1/c[d-Vclg[?m}ͪoutV}&{Y9$DJ$RRǂ%%%1OXXQhŔ;(_B)mŐ!c@ЮLj'Ķ`'&e-HaZ)Ud`WZ27&Et|X5{mȵfK'"&D thgf9L++Dk"8\*@z G\0֓8 3!8 h>hiy~T]Znb|TO g1Tcө?Z^_~ͯlTL? 0y

mathematica非线性拟合问题date={{1990, 632.98}, {1991, 702.15}, {1992, 809.94}, {1993, 973.35}, {1994, 1147.37}, {1995, 1289.96}, {1996, 1389.75}, {1997, 1577.45}, {1998, 1742.95}, {1999, 1986.82}, {2000, 2234.24}, {2001, 2572.82}, {200
mathematica非线性拟合问题
date={{1990, 632.98}, {1991, 702.15}, {1992, 809.94}, {1993, 973.35}, {1994,
1147.37}, {1995, 1289.96}, {1996, 1389.75}, {1997, 1577.45}, {1998,
1742.95}, {1999, 1986.82}, {2000, 2234.24}, {2001, 2572.82}, {2002,
3022.15}, {2003, 3602.15}, {2004, 4175.37}, {2005, 5007.73}, {2006,
6030.67}, {2007, 7234.57}, {2008, 8601.}, {2009, 10855.5}, {2010,
13740.5}}
n1/(1+(n1/632.98-1)Exp[-r(t-1990)],其中n1,r是参数 t是自变量
求解答,马上就结束了,求帮助. 求解,急啊.先谢谢了

mathematica非线性拟合问题date={{1990, 632.98}, {1991, 702.15}, {1992, 809.94}, {1993, 973.35}, {1994, 1147.37}, {1995, 1289.96}, {1996, 1389.75}, {1997, 1577.45}, {1998, 1742.95}, {1999, 1986.82}, {2000, 2234.24}, {2001, 2572.82}, {200
data = {{1990,632.98},{1991,702.15},{1992,809.94},{1993,
973.35},{1994,1147.37},{1995,1289.96},{1996,1389.75},{1997,
1577.45},{1998,1742.95},{1999,1986.82},{2000,
2234.24},{2001,2572.82},{2002,3022.15},{2003,
3602.15},{2004,4175.37},{2005,5007.73},{2006,
6030.67},{2007,7234.57},{2008,8601.},{2009,10855.5},{2010,
13740.5}};
FindFit[data,n1/(1 + (n1/632.98 - 1) Exp[-r (t - 1990)]),{n1,r},t]

mathematica非线性拟合问题date={{1990, 632.98}, {1991, 702.15}, {1992, 809.94}, {1993, 973.35}, {1994, 1147.37}, {1995, 1289.96}, {1996, 1389.75}, {1997, 1577.45}, {1998, 1742.95}, {1999, 1986.82}, {2000, 2234.24}, {2001, 2572.82}, {200 mathematica非线性拟合问题,d={{0,500},{3,470},{6,425},{9,372},{12,317},{15,264},{18,215},{21,160},{24,108},{27,55},{30,1}}拟合成500-980*t/(3*k)+98000/(9*k^2)*(1-Exp[-3*k*t/100]),肿么办啊,明天就交了,急死我了. 怎样用 mathematica 拟合二元函数? matlab非线性拟合问题,急用,待拟合函数形式为：ln[（230-a)/(y-a)]=[(x-1/4)/b]^c,需要拟合a,b,c,其中40 mathematica数据拟合如何用mathematica得到非线性回归方程?data={{14.80,310},{18.74,700},{22.86,1160},{26.26,1800},{29.50,2680},{31.15,3200}}y=9616.5256/(1+256.32477Exp[-0.15570869]) matlab 非线性拟合拟合参数 Nm 和 k ,见图 matlab 拟合一元非线性拟合 用什么函数? 函数拟合问题其中T为1,求a和Th.应该是spss 参数拟合，非线性回归，加权最小二乘法等等 说不得也是二阶最小二乘法。 什么叫线性回归、非线性回归.回归分析是什么.线性拟合、非线性拟合,参数拟合、非参数拟合 mathematica非线性拟合拟合的形式是Log((5.47-2*a+y)/(4*y-2*a))=1/150*b*x ,我有一批x相应y的数据,想求参数a、b.用mathematica应该怎么写啊?（包括x、y的录入方式也不知道.） Mathematica非线性拟合,data = Table[{{1.081533825,47},{1.079100598,48},{1.071849984,52},{1.056458082,64},{1.045335019,76},{1.028929244,100},{1.014458888,127},{1.006932388,143},{1.003074162,147},{1.000767214,150},{0.997194416,151},{0.995034543,150 matlab 非线性规划问题 这位哥们,还是关于mathematica的我这是解一个变系数非线性偏微分方程,在这里出现了错误,你帮我看看问题出哪了 关于非线性拟合的参数问题我用1stOpt进行非线性拟合,现在我对于拟合的结果有点疑问,Root of Mean Square Error (RMSE):26.44652781262Sum of Square Error (SSE):1748547.08335921Correlation Coef.(R):0.259670235027033R-Square:0 变系数非线性常微分方程组用mathematica怎么求解? matlab中在非线性回归问题matlab中,在非线性回归检验中sse是什么意思啊?有什么用处?代表了什么?越小越好?一般数值多少算方程拟合的好? spss多元非线性回归问题有两个自变量S和D,因变量为R,不知道回归模型,怎么能够拟合出一个合适的表达式?二元非线性回归分析 matlab中如何做非线性最小二乘拟合