MATLAB: Remove text from matrix

data importheaderlinetextdata

Hello,
I have a matrix data of n rows(more than 1000) and p columns(exactly six). In this matrix I have a text data repeated each 25 rows. To be more clear I will give you an example:
%row1%   Freq X Y Z deltaX deltaY deltaZ
           10 20 30 40 50 60 70 
           1 2 3 4 5 6 7  
           .......
            1 2 3 4 5 6 7 
  %row26%  Freq X Y Z deltaX deltaY deltaZ
           0.1 0.2 0.3 0.4 0.5 0.6 0.7 
             .......
my question is to how import this data and remove the text data. Knowing that I have tried the simple command %
 importdata('filename.dat');
but it imports only the first 25 rows.
Thank you in advance for you precious help.
M.
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