xpolyfit.m

来自「《实用化工计算机模拟：MATLAB在化学工程中的应用 》这本书光盘里的程序~」· M 代码 · 共 19 行

% xPolyfit.m
%  函数polyfit()的应用示例
% 
%   Author: HUANG Huajiang
%   Copyright 2003 UNILAB Research Center, 
%   East China University of Science and Technology, Shanghai, PRC
%   $Revision: 1.0 $  $Date: 2003/02/24 $

clear all
clc

t = [0	    0.25	0.50	0.75	1.00];
y = [1.093	1.2560	1.6387	2.1570	2.7183];
p = polyfit(t,y,2)
ti = linspace(t(1),t(end),100);
yi = polyval(p,ti);
plot(t,y,'o',ti,yi,'-')
xlabel('t')
ylabel('y')