title: Read a .txt file with both numerical data and words Matlab
body: <p>i want to read .txt file in matlab with both data and words
  the contents of .txt file are </p>
  
  <pre><code>(title "Particle Tracks")
  (labels "Time" "Particle Velocity Magnitude")
  
  ((xy/key/label "particle-1")
  1e-06   45.4551
  2e-06   40.3895
  2e-06   44.0437
  3e-06   34.9606
  4e-06   33.1695
  4e-06   35.3499
  5e-06   29.9504
  6e-06   28.0226
  6e-06   35.1794
  7e-06   41.2255
  ....
  
  ((xy/key/label "particle-2")
  1e-06   43.7789
  1e-06   45.0513
  2e-06   44.1221
  3e-06   37.8328
  3e-06   43.6451
  4e-06   29.1166
  5e-06   41.3342
  6e-06   28.7241
  6e-06   36.3779
  7e-06   31.9631
  8e-06   29.2826
  9e-06   24.7755
  9e-06   24.9516
  1e-05   22.7528
  1e-05   26.6802
  1.1e-05 34.4668
  </code></pre>
  
  <p>the file extends  for 100 particles ,1st column is time and 2nd column is velocity 
   I intend to find the mean velocity of all the particles at various times of column 1,so basically i want to add corresponding column 2 values and divide them by hundred and display against the the column 1 values which is same for all the hundred particles![enter image description here][2]</p>
  
  <p>thanks</p>