how to remove word from these .txt file in matlab

i am facing problems to kickout word (DNS,T) from these kind of files in matlab and do same for other files too

 1    0.0
      2    0.0
      3    0.0
      4    0.0
      5    0.0
      6    0.0
      7    0.0
      8    0.0
      9    0.0
     10    0.0
     11    0.0
     12    0.0
     13    0.0
     14    0.0
     15    2.0
     16   25.0
     17    0.0
     18    2.0
     19    9.0
     20    1.0
     21    8.0
     22    0.0
     23    0.0
     24    0.0
     25    0.0
     26    0.0
     27    1.5
     28   12.0
     29    0.0
     30    0.0
     31    0.0
     32    0.0
     33    0.0
     34    0.0
     35    0.0
     36    0.0
     37    T  
     38    2.5
     39    8.0
     40   14.0
     41    T  
     42    0.0
     43   41.0
     44    0.0
     45    0.0
     46    0.0
     47    0.0
     48    0.0
     49    0.0
     50    0.0
     51    0.0
     52    0.0
     53    0.0
     54    0.0
     55    3.0
     56    5.0
     57    0.0
     58    0.0
     59    0.0
     60   DNA   
     61   DNA   
     62   DNA   
     63   DNA   
     64   DNA   
     65   DNA   
     66   DNA   
     67   DNA   
     68   DNA