二维数据的平滑
有时候数据较为粗糙，边缘性较大，需要做个平滑。
一维的平滑，smooth;
二维的平滑，smooth2；
用法介绍：
函数使用方法：
MATRIXOUT=SMOOTH2(MATRIXIN,Nr,Nc)；
平滑度的大小设定：
Inputs: matrixIn - original matrix
Nr - number of points used to smooth rows
Nc - number of points to smooth columns
输出结果：
Outputs:matrixOut - smoothed version of original matrix
默认选择：
Remark: By default, if Nc is omitted, Nc = Nr.
函数下载路径：
ww2.mathworks.cn/login/mwa-sso?uri=https%3A%2F%2Fww2.mathworks.cn%2Fmatlabcentral%2Ffileexchange%2F6298-smooth2&tx_id=ggWzuRiuhMx9Yai1ngtN
Cite As
Kelly Hilands (2024). smooth2 (https://www.mathworks.com/matlabcentral/fileexchange/6298-smooth2), MATLAB Central File Exchange. Retrieved .
实例演示：
示例代码：
clear;clc;close all;% 读取数据load('data.mat')diat_depth = double(diat_depth);% 画图close allfigureset(gcf,'position',[50 50 850 850])pcolor(diat_depth)shading flatcaxis([-20 10])axis off% 读取颜色包cmap = load('colormore_23.txt');colormap(flip(cmap))% 添加标题title('未平滑的图像','fontsize',20)% 保存图像export_fig('未平滑的图像.jpg','-r600')%% 平滑度的设置for Nc = 1:2:10Nr = Nc ;matrixOut = smooth2a(diat_depth, Nr, Nc);% MATRIXOUT=SMOOTH2(MATRIXIN,Nr,Nc) smooths the data in MATRIXIN% using a running mean over 2*N+1 successive points, N points on% each side of the current point. At the ends of the series% skewed or one-sided means are used.%% Inputs: matrixIn - original matrix% Nr - number of points used to smooth rows% Nc - number of points to smooth columns% Outputs:matrixOut - smoothed version of original matrix%% Remark: By default, if Nc is omitted, Nc = Nr.% 画图close allfigureset(gcf,'position',[50 50 850 850])pcolor(matrixOut)shading flatcaxis([-20 10])axis off% 读取颜色包cmap = load('colormore_23.txt');colormap(flip(cmap))% 添加标题title(['平滑度为',num2str(Nc),'的图像'],'fontsize',20)% 保存图像export_fig(['平滑度为',num2str(Nc),'的图像.jpg'],'-r600')close allend
