detect the Peak or valley in a 1 D signal

%To detect the Peak or valley in a 1 D signal；with some parameter for select

Description

%To detect the Peak or valley in a 1 D signal
% input: y signal ;n*1
% T threshold of D-value ,which is difference between the peak value
% or valley value and bilateral value
% d the distance of bilateral value
% p_v parameter for peak or valley ;p_v=0 all;pv=1,peak only;others
% valley only
% example [x1 x2 x3 x4 x5] d=2; T=0.5; When (x1+x5)-2x3>T ,the x3 will be
% decided as a valley
% output: ind the index of peak or valley

• Required Products: MATLAB
• MATLAB release: MATLAB 8.1 (R2013a)