You can use the cubic spline interpolant obtained by cs = csapi(x,y); and plot the spline, along with the data, with the following code: fnplt(cs); hold on plot(x,y,'o') legend('cubic spline','data') hold off This produces a figure like the following. Cubic Spline Interpolan...
解线性方程组(9) 三、北太天元ormatlab实现 Ⅰ型 function[s,M]=spline1_interp(x0,y0,df0,dfn,x)% I型三次样条插值% Input: 节点向量x0,y0,两个端点的一阶导 df0,df1% 目标点 x% Output: 插值结果 s , M% 子函数:divided_differences,tridiag_chase% Version: 1.0% last modified: 04/14/202...
Spline Interpolation of Sine Data Copy Code Copy Command Use spline to interpolate a sine curve over unevenly-spaced sample points. Get x = [0 1 2.5 3.6 5 7 8.1 10]; y = sin(x); xx = 0:.25:10; yy = spline(x,y,xx); plot(x,y,'o',xx,yy) Spline Interpolation with Specifie...
Copy Code Copy CommandThis example shows how to use the csapi and csape commands from Curve Fitting Toolbox™ to construct cubic spline interpolants. The CSAPI Command The command values = csapi(x,y,xx) returns the values at xx of the cubic spline interpolant to the given d...
一般有三种边界条件:自然边界(Natural Spline),固定边界(Clamped Spline),非节点边界(Not-A-Knot Spline)。 - 自然边界 指定端点二阶导数为0,即S^{''}_0(x_0) = S^{''}_{n-1}(x_n)=0。 固定边界 人为指定端点一阶导数,这里分别定为A和B,即S^{'}_0(x_0) = A, S^{'}_{n-1}(x_n)...
MATLAB在一维插值函数interp1中,提供了四种插值方法选择:线性插值,三次样条插值,三次插值和最近邻点插值(linear,spline,cubic,nearest)。Interp1的基本格式为: interp1(x,y,cx, ‘method’) 对一组节点进行插值,计算插值点的函数值 其中分别表示为节点向量值和对应的节点函数值,如果为矩阵,则插值对的每一列进行...
本资源提供了一个使用MATLAB实现的三次样条插值(Cubic Spline Interpolation)的示例代码。三次样条插值是一种在给定数据点集合之间插入平滑曲线的方法,该曲线由一系列三次多项式段组成,每段只在相邻的两个数据点间有效。这种插值方法特别适用于需要通过一组离散数据点生成平滑曲线的情况,广泛应用于数据可视化、信号处理和...
cubicSpline.m Is used to give an accurate curved line through a given set of x,y data points. It is more accurate then the Matlab supplied spline function. You may set the level of smoothness of the curve. Inputs: coeff - an (Nx2) matrix where col 1 is the X data and column 2...
This MATLAB function generates a smooth vehicle path, consisting of numSmoothPoses discretized poses, by fitting the input reference path poses to a cubic spline.
Method是选择插值的方法，二维插值的方法一般有邻近点插值Nearest，双线性插值Linear，三次样条插值Spline和双立方插值Cubic。工具/原料 MATLAB interp2 方法/步骤 1 第一，利用峰值函数peaks（x,y,z）演示二维插值。启动MATLAB，新建脚本（Ctrl+N），输入如下代码：close all; clear all; clcn1=1; [x1,y1]=...