MATLAB峯值（中發現的峯值，但想知道的價值）

Question

我已經繪製出來的圖表和我有一些是在這裏繪製圖形的

fs = 100; %freq 100hz 
N = length(pbcg); %data length, before that do a pbcg=load('pbcg.txt') 
duration_in_seconds = N/fs; 
duration_in_minutes = duration_in_seconds/60; 
BPM_avg = beat_count/duration_in_minutes; 

fid = fopen('y1.txt','a'); %txt naming and append 

%count the dominant peaks in the signal 
for k = 2 : length(pbcg)-1 
    if (pbcg(k) > pbcg(k-1) && pbcg(k) > pbcg(k+1) && pbcg(k) > 1) 
     beat_count = beat_count + 1; 
    end 
    fprintf(fid, 'x_axis%i\t ', k); %open writer 
    fprintf(fid, 'BPM%i\n ', BPM_avg); %open writer 
end 
disp(BPM_avg); %display the BPM 
fclose(fid); %close writer 

圖像是這裏的代碼（唐」沒有聲望插入img）... https://skydrive.live.com/embed?cid=0525DA685954952E&resid=525DA685954952E%21407&authkey=ALmvTzzQ7Xer2Do

我想知道的是，你可以看到，有11峯值最高，我怎麼得到'價值'峯值本身？因爲在我想知道如何得到Y軸值或計算值。

Answer 1

我做這種方式就像@Adiel如何教..

%determine the bpm 

beat_count = 0; 
fs = 100; %freq 100hz 
N = length(pbcg); %data length, before that do a pbcg=load('pbcg.txt') 
duration_in_seconds = N/fs; 
duration_in_minutes = duration_in_seconds/60; 
BPM_avg = beat_count/duration_in_minutes; 

fid = fopen('y1.txt','a'); %txt naming and append 

%count the dominant peaks in the signal 
for k = 2 : length(pbcg)-1 
    if (pbcg(k) > pbcg(k-1) && pbcg(k) > pbcg(k+1) && pbcg(k) > 1) 
    beat_count = beat_count + 1; 
    peaks(beat_count)=pbcg(k); 
end 
fprintf(fid, 'x_axis%i\t ', k); %open writer 
fprintf(fid, 'BPM%i\n ', BPM_avg); %open writer 
end 

disp(BPM_avg); %display the BPM 
fclose(fid); %close writer 

，並從MATLAB命令我輸入「峯」，它顯示我與y軸分值峯的總數。但是因爲我需要清除「beat_count」和「峯值」，因爲每次我'運行'該函數都會使數據量翻倍