求大侠拟合二元函数.最好是MATALB拟合.z=a*x+b*x*y+c*exp(d*x)-(b/d)*y*exp(d*x)x=【29,65,43,39,62,40,43,52,53,61,30,42,39,43,57,47,17,16】y=【20,61,54,16,53,42,33,19,59,38,19,44,24,24,22,42,10,10】z= 【05,12,11,11,11,11,13,18,12,10,13,
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![求大侠拟合二元函数.最好是MATALB拟合.z=a*x+b*x*y+c*exp(d*x)-(b/d)*y*exp(d*x)x=【29,65,43,39,62,40,43,52,53,61,30,42,39,43,57,47,17,16】y=【20,61,54,16,53,42,33,19,59,38,19,44,24,24,22,42,10,10】z= 【05,12,11,11,11,11,13,18,12,10,13,](/uploads/image/z/12710852-44-2.jpg?t=%E6%B1%82%E5%A4%A7%E4%BE%A0%E6%8B%9F%E5%90%88%E4%BA%8C%E5%85%83%E5%87%BD%E6%95%B0.%E6%9C%80%E5%A5%BD%E6%98%AFMATALB%E6%8B%9F%E5%90%88.z%3Da%2Ax%2Bb%2Ax%2Ay%2Bc%2Aexp%28d%2Ax%29-%28b%2Fd%29%2Ay%2Aexp%28d%2Ax%29x%3D%E3%80%9029%2C65%2C43%2C39%2C62%2C40%2C43%2C52%2C53%2C61%2C30%2C42%2C39%2C43%2C57%2C47%2C17%2C16%E3%80%91y%3D%E3%80%9020%2C61%2C54%2C16%2C53%2C42%2C33%2C19%2C59%2C38%2C19%2C44%2C24%2C24%2C22%2C42%2C10%2C10%E3%80%91z%3D+%E3%80%9005%2C12%2C11%2C11%2C11%2C11%2C13%2C18%2C12%2C10%2C13%2C)
求大侠拟合二元函数.最好是MATALB拟合.z=a*x+b*x*y+c*exp(d*x)-(b/d)*y*exp(d*x)x=【29,65,43,39,62,40,43,52,53,61,30,42,39,43,57,47,17,16】y=【20,61,54,16,53,42,33,19,59,38,19,44,24,24,22,42,10,10】z= 【05,12,11,11,11,11,13,18,12,10,13,
求大侠拟合二元函数.最好是MATALB拟合.z=a*x+b*x*y+c*exp(d*x)-(b/d)*y*exp(d*x)
x=【29,65,43,39,62,40,43,52,53,61,30,42,39,43,57,47,17,16】
y=【20,61,54,16,53,42,33,19,59,38,19,44,24,24,22,42,10,10】
z= 【05,12,11,11,11,11,13,18,12,10,13,18,16,19,12,16,15,13】
最好带程序.算出a,b,c,d.
求大侠拟合二元函数.最好是MATALB拟合.z=a*x+b*x*y+c*exp(d*x)-(b/d)*y*exp(d*x)x=【29,65,43,39,62,40,43,52,53,61,30,42,39,43,57,47,17,16】y=【20,61,54,16,53,42,33,19,59,38,19,44,24,24,22,42,10,10】z= 【05,12,11,11,11,11,13,18,12,10,13,
d若是确定,就会转化为线性拟合,问题就简单多了.但是现在d既在分母上,又在指数上,变成了非线性拟合,问题变得极为复杂.建议先根据经验值估计一个d,然后求出拟合出a,b,c后再变换一个d,通过这种方法可以给出一个近似最优的d和相应的a,b,c.
简单计算了一下,找了一组,但评估显示不是太好,仅供参考吧。
a = 0.322943, b = -5.87159*10^-26, c = -3.85351*10^-24, d = 0.937079
擦