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小木虫论坛-学术科研互动平台 » 计算模拟区 » 仿真模拟 » MATLAB » 【求助】帮忙修改matlab 关于多项式拟合系数的程序
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chzhiyu

新虫 (初入文坛)

[交流] 【求助】帮忙修改matlab 关于多项式拟合系数的程序 已有2人参与

clc
clear all
X=[900,950,1000,1050,1100,1150,1200]         
Y=[-1,0,1,1.699]     
Z=[
133.501        123.949        91.4564        70.3825        46.661        39.617        23.3159
187.145        187.145        139.5592        102.036        71.6103        63.1213        42.2399
259.807        222.929        186.213        164.972        118.145        92.631        72.015
286.845        259.389        256.336        181.183        139.285        116.330        84.791
]
Z=log10(Z)                           
Xi=(900:1:1200)
Yi=(-1:0.02:1.699)
Zi=interp2(X,Y,Z,Xi,Yi','spline')  
Y2=[ Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi' Yi']
p = polyfit (Y2,Zi,2)
我想找到多项式拟合的系数，但是运行程序只是一组系数，但是我想找到每组数据的系数，不知道错在哪  请高手指教，不胜感激

[ Last edited by chzhiyu on 2010-4-19 at 20:45 ]
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liuyalei820

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adu886886(金币+1):谢谢提供意见 2010-04-22 08:27
chzhiyu(金币+10): 2010-05-21 15:29:16
分别对各列数据进行拟合。。。。
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3楼2010-04-21 10:28:20
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anyuezhiji

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adu886886(金币+1):谢谢提供意见 2010-04-21 08:22
chzhiyu(金币+10): 2010-05-21 15:29:03
用for循环试试
别一次把矩阵输入polyfit拟合
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暗月下没有留下风的痕迹，但它已经寂然飘逝。。By<暗月之寂>:tiger38:
2楼2010-04-20 17:49:31
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liuyalei820

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分别对各列数据进行拟合，循环操作。。。。
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4楼2010-04-21 10:29:11
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