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.CubicSplineInterpolationFunction1.m:实现三次样条插值+一阶边界条件。 2.CubicSplineInterpolationFunction2.m:实现三次样条插值+二阶边界条件。 3.LagrangeInterpolation.m:实现拉格朗日插值。 4.PiecewiseLinearInterpolation.m:实现分段线性插值。 5.三次样条插值(一,二阶边界条件)的公式推导.word:阐述三次样条插值...
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'); ...
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...
The query points are locations where interp1q uses linear interpolation to determine the approximate value of the function represented by Y. interp1q returns NaN for any values of xi that lie outside the coordinates in x. Example: [1.5; 2.5] Data Types: single | double Complex Number ...
Quaternion spherical linear interpolation (SLERP) is an extension of linear interpolation along a plane to spherical interpolation in three dimensions. The algorithm was first proposed in[1]. Given two quaternions,q1andq2, SLERP interpolates a new quaternion,q0, along the great circle that connect...
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 ...
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,...