functiony0=Lagrange_interpolation(x,y,x0)%功能:拉格朗日插值多项式求解%输入:x为插值节点,y为插值节点对应的值,x0为计算点集%输出:x0处值的集合y0y0 =zeros(1,length(x0));fori=1:1:length(x0)%循环作用:遍历x0X =ones(1,length(x));fork =1:1:length(x)%循环作用:(x0(i)-x(j))/(x(k)...
function v = piecelin(x, y, u) % Piecewise linear interpolation. % v = piecelin(x, y, u) finds the piecewise linear L(x). % First divided difference. delta = diff(y)./diff(x); % Find subinterval indices k so that x(k) <= u < x(k+1). n = length(x); k = ones(size...
1.线性插值(Linear Interpolation) 线性插值假设两个已知数据点之间的函数是线性的。在MATLAB中,你可以使用interp1函数进行线性插值。 matlab x = [1,2,3,4,5]; y = [2,4,5,4,5]; xq =1.5:4.5;% 查询点 yq = interp1(x, y, xq,'linear');% 线性插值 plot(x, y,'o', xq, yq,'-'); ...
figure surf(Xq,Yq,Vq); title('Linear Interpolation Using Finer Grid'); Interpolate over a Grid Using Cubic Method Coarsely sample the peaks function. [X,Y] = meshgrid(-3:3); V = peaks(7); Plot the coarse sampling. figure surf(X,Y,V) title('Original Sampling'); ...
% 'linear' -- piecewise linear interpolation% 'nearest' -- nearest neighbor interpolation% operator: selected morphological operator, see sub-function 'MF_operator'%% Output:% y: morphological filtered signal x = x(:)-mean(x); % a vectorN = length(x); [indmin, indmax] = extreme_...
Linear interpolation is the default interpolation method for numeric and logical images. "cubic" Cubic interpolation Data Types: char | string Name-Value Arguments Specify optional pairs of arguments as Name1=Value1,...,NameN=ValueN, where Name is the argument name and Value is the corresponding...
1function [ ZI ] =interpolation( I,zmf )23%% ---双线性插值法处理图像---4%Input:5% I:图像文件名或矩阵(整数值(0~255))6%zmf:缩放因子,即缩放的倍数7%Output:8%对矩阵I进行zmf倍的缩放并显示910%%命令行中输入以下命令运行即可:11% interpolation('flower2.png',4);1213%%Step1 对数据进行预处理...
iterations: 9 funcCount: 9 algorithm: 'golden section search, parabolic interpolation' 例5-3 在[0,5]上求下面函数的最小值解: f (x) x3 cosx ex x log x 先自定义函数:在 MATLAB 编辑器中建立 M 文件为: function f = myfun(x) f = (x-3).^2 - 1; 保存为 myfun.m,...
function [y, t_new] = sigexpandmatlab(x, t_old, factor) Signal expansion using linear interpolation x: input signal t_old: time vector of the input signal factor: expansion factor y: expanded signal t_new: time vector of the expanded signal Determine new sampling rate dt_old = t_old(...
3． 多维插值: (3D Interpolation)包括三维插值函数interp3和多维插值函数interpn,函数调用格式与一、二维插值基本相同。VI=interp3(X,Y,Z,V,XI,YI,ZI,method)其中： X,Y,Z—自变量组成的数组；V—三维函数数组 XI,YI,ZI—插值点的自变量数组 Method --插值方法选项。（FLOW A simple function ...