//=== === === === === === === === === === === === === === = //函数说明 //函数名称：polyfit //函数功能：最小二乘法曲线拟合 //使用方法：double *x ---- 存放n个数据点的X坐标 // double *y ---- 存放n个数据点的Y坐标 // int n -------- 给定数据点个数 // double *a ---- 返回m-1次拟合多项式的m个系数 // int m -------- 拟合多项式的项数，即拟合多项式的最高次为m-1。要求m<=n,且 // m<=20。若m>n或m>20，则本函数自动按m=min{n,20}处理 // double *dt --- dt[0]返回拟合多项式与各数据点误差的平方和；dt[1]返回拟合多 // 项式与各数据点的误差绝对值之和；dt[2]返回拟合多项式与各数据 // 点误差绝对值的最大值 //注意事项：拟合多项式的形式为 y = b0 + b1*(x-Xavr)...
上传时间： 2015-07-19
上传用户：waizhang
MATLAB插值与拟合（线性拟合函数：regress() 多项式曲线拟合函数：polyfit( ) 多项式曲线求值函数：polyval( ) 多项式曲线拟合的评价和置信区间函数：polyconf( ) 稳健回归函数：robust( ) 向自定义函数拟合 ）
标签： polyconf regress polyfit polyval
上传时间： 2015-10-08
上传用户：qb1993225
函数说明 //函数名称：polyfit //函数功能：最小二乘法曲线拟合
上传时间： 2014-01-06
上传用户：cjl42111
多项式曲线拟合 任意介数 Purpose - Least-squares curve fit of arbitrary order working in C++ Builder 2007 as a template class, using vector<FloatType> parameters. Added a method to handle some EMathError exceptions. If do NOT want to use this just call polyfit2 directly. usage: Call polyfit by something like this. Cpolyfit<double> polyfitObj double correlation_coefficiant = polyfitObj.polyfit(X, Y, A) where X and Y are vectors of doubles which must have the same size and A is a vector of doubles which must be the same size as the number of coefficients required. returns: The correlation coefficient or -1 on failure. produces: A vector (A) which holds the coefficients.
标签： Least-squares arbitrary Purpose Builder
上传时间： 2013-12-18
上传用户：宋桃子
function [R,k,b] = msc(A) % 多元散射校正 % 输入待处理矩阵，通过多元散射校正，求得校正后的矩阵 %% 获得矩阵行列数 [m,n] = size(A); %% 求平均光谱 M = mean(A,2); %% 利用最小二乘法求每一列的斜率k和截距b for i = 1:n a = polyfit(M,A(:,i),1); if i == 1 k = a(1); b = a(2); else k = [k,a(1)]; b = [b,a(2)]; end end %% 求得结果 for i = 1:n Ai = (A(:,i)-b(i))/k(i); if i == 1 R = Ai; else R = [R,Ai]; end end
上传时间： 2020-03-12
上传用户：15275387185
