maxmin.m

来自「在MATLAB环境下实现二维emd分解的实现」· M 代码 · 共 22 行

function [max,max_No,min,min_No]=MaxMin(ip)
%%%%%%%%%%--MaxMin函数
%%%%%%%%%%--求局部极值点及其位置
max=0;
max_No=0;
min=0;
min_No=0;
N=length(ip);
j1=1;
j2=1;
for i=2:(N-1)
    if((ip(i)>=ip(i-1)&&ip(i)>ip(i+1))||(ip(i)>ip(i-1)&&ip(i)>=ip(i+1)))
        max(j1)=ip(i);
        max_No(j1)=i;
        j1=j1+1;
    elseif((ip(i)<=ip(i-1)&&ip(i)<ip(i+1))||(ip(i)<ip(i-1)&&ip(i)<=ip(i+1)))
        min(j2)=ip(i);
        min_No(j2)=i;
        j2=j2+1;
    end
end