title: Reading and Plotting from text files
body: <p>I have some problems in reading data from text file and plotting it.The text file contains </p>
  
  <pre><code>Date; Time; Temp °C
  05.08.2011; 11:00:47;23.75
  05.08.2011; 11:01:21;23.69
  05.08.2011; 11:01:56;25.69
  05.08.2011; 11:02:16;23.63
  05.08.2011; 11:02:50;23.63
  05.08.2011; 11:03:24;23.63
  </code></pre>
  
  <p>I want to plot the Temperature values with elapsed minutes. 
  firstly i used </p>
  
  <pre><code>[a,b]=textread('file1.txt','%s %s','headerlines',1)
  </code></pre>
  
  <p>to read the data in a string and I get     </p>
  
  <pre><code>'17:09:16;21.75'
  </code></pre>
  
  <p>After that I used </p>
  
  <blockquote>
    <blockquote>
      <p>a= strread('17:08:00;21.81','%s','delimiter', ';')</p>
    </blockquote>
  </blockquote>
  
  <p>to get </p>
  
  <pre><code>'17:08:00'
  '21.81'
  </code></pre>
  
  <p>But after this I am not been able to figure out how to move forward to deal with both these strings, especially time.
  I want to plot temperature with time on xaxis..but not this time the elapsed time..in this case 2 mins 37 secs.
  Help needed</p>
  
  <p>Thanks Aabaz.thats really a big favor..I dun why I could figure it out ..I spent so much time on it
  I have some 50 files comprising this data..If i want to loop it under this code , how can accomplish it, cz i have names of the file under ROM IDs..alike 1AHJDDHUD1224.txt.
  How wud pass the file names in the loop.Do I have to change the names of the files then pass them under loop.I dun knw</p>
  
  <p>I have one more question that if I wanted the values to be plotted after every 60 seconds..alike as soon the data is available in text files graph is plotted , and then graph is updated after every 60 sec until some more values are available in text file</p>