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POMatlab plot graph(segment by segment) and user input threshold value before writing to txt
 

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  1. POMatlab plot graph(segment by segment) and user input threshold value before writing to txt
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    <p>I have been trying to write the x-axis values (peak only) to txt file using this code (this method is working).</p> <pre><code>%determine the bpm %count the dominant peaks in the signal fid = fopen('y1.txt','a'); %txt naming and append beat_count = 0; for k = 2 : length(pbcg)-1 if (pbcg(k) &gt; pbcg(k-1) &amp;&amp; pbcg(k) &gt; pbcg(k+1) &amp;&amp; pbcg(k) &gt; 1) beat_count = beat_count + 1; end end fprintf(fid, '%i\n', k); %open writer fs = 100; %freq 100hz N = length(pbcg); duration_in_seconds = N/fs; duration_in_minutes = duration_in_seconds/60; BPM_avg = beat_count/duration_in_minutes; fclose(fid); %close writer </code></pre> <p>But the problem comes in here when i have modified it to plot the graph segment by segment (i manage to get this done) but the problem is not able to write the x-axis value to the txt file when my code is like this.. anything i done wrong?</p> <pre><code>%plot segment by segment data = pbcg;%data value from 1 to 10000 rows = reshape(data, 1000, numel(data)/1000)';%reshape the data into %matrix by 1000 against total num of element in array and then / 1000) fid = fopen('y1.txt','a'); %txt naming and append beat_count = 0; for e = 1:size(rows,1), %plot normal &amp; with nodes together figure,plot(rows(e,:)),hold on,plot(rows(e,:),'ro'); %if statement to find peak if (pbcg(k) &gt; pbcg(k-1) &amp;&amp; pbcg(k) &gt; pbcg(k+1) &amp;&amp; pbcg(k)&gt; input('Key in the threshold value: ')) beat_count = beat_count + 1; peaks(beat_count)=pbcg(k); end pause;%pause, on keypress go to next plot fprintf(fid, 'x_axis%i\n ', peaks); %open writer end fclose(fid); %close writer </code></pre> <p>the result i got was the entire list of peaks even after i enter the threshold value.</p>
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    1. COi want to print only threshold of a certain level. if i replace input('key in the threshold ') with '>1' instead, it would print only value that is above 1.. and let's say if i got part of the segment that is not running well and the entire segment is around threshold 0.5, they would be miss out. need advice
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