title: How do I plot vectors of different length on the same axes in MATLAB?
body: <p>I am running into trouble trying to compare and plot two files of different length. In MATLAB I do not know how to plot two vectors of different length in the same x-axis. As one file has some data missing, I want to create a row and put blank space for that corresponding time stamp. Here are samples of data files:</p>
  
  <p><em>file 1:</em></p>
  
  <pre><code>date time  T01  T02  T03  T04  T05
  8/16/2009 0:00, 516.900024, 450.5,      465.200012, 546.799988, 539.700012
  8/16/2009 0:10, 351.200012, 398.899994, 418.100006, 510.299988, 518.5
  8/16/2009 0:30, 241.399994, 252.399994, 256,        360.600006, 386.5
  8/16/2009 1:00, 184.199997, 154.300003, 143.899994, 236.600006, 244.399994
  </code></pre>
  
  <p><em>file 2:</em></p>
  
  <pre><code>date time  T01  T02  T03  T04  T05
  8/16/2009 0:00, 656.799988, 611.200012, 860.599976, 604.700012, 288.5
  8/16/2009 0:10, 527.400024, 359.200012, 789.099976, 789.099976, 446.799988
  8/16/2009 0:20, 431.5,      327.100006, 763.599976, 895.099976, 689.099976
  8/16/2009 0:30, 328.399994, 301.700012, 824,       1037.099976, 955.299988
  8/16/2009 0:40, 261.5,      332.200012, 811.700012, 962.200012, 915.599976
  8/16/2009 0:50, 180.300003, 291.100006, 700.099976, 855.200012, 836.900024
  8/16/2009 1:00, 294.399994, 281.399994, 731.299988, 881.700012, 666.200012
  8/16/2009 1:10, 274.899994, 334.200012, 759.400024, 913.900024, 760.799988
  </code></pre>
  
  <p>I am trying to remake file 1 as follows:</p>
  
  <pre><code>8/16/2009 0:00, 516.900024, 450.5,      465.200012, 546.799988, 539.700012
  8/16/2009 0:10, 351.200012, 398.899994, 418.100006, 510.299988, 518.5
  8/16/2009 0:20, ,,,,
  8/16/2009 0:30, 241.399994, 252.399994, 256,        360.600006, 386.5
  8/16/2009 0:40, ,,,,
  8/16/2009 0:50, ,,,,
  8/16/2009 1:00, 184.199997, 154.300003, 143.899994, 236.600006, 244.399994
  8/16/2009 1:10, ,,,,
  </code></pre>
  
  <p>Is there a way to do this? it would help me a lot as I am trying to link up 2 files based on time stamps.</p>
  
  <p>p.s.: I am trying to use the <code>ismember</code> function in MATLAB and am having all sorts of problems.</p>