MATLAB: Looking for specific data in a text file

locate data in text fileMATLABregexp

Hi, I need to extract information out of a total of 150 text files which record variables in different locations for each text file, For example:
#————————— CI – Effective/Macro Compliance Matrix
    0.1910E-01   -0.7317E-02   -0.7317E-02
   -0.7317E-02    0.3140E-01   -0.1456E-01
   -0.7317E-02   -0.1456E-01    0.3140E-01
                                             0.9510E-01
                                                           0.1051E+00
                                                                         0.1051E+00
 Effective Engineering Moduli
     E11S= 0.5235E+02
     N12S= 0.3830
     E22S= 0.3185E+02
     N23S= 0.4637
     E33S= 0.3185E+02
     G23S= 0.1051E+02
     G13S= 0.9514E+01
     G12S= 0.9514E+01
 Effective Thermal Expansion Coefficients
    0.0000E+00    0.0000E+00    0.0000E+00
Is there a fast way of getting E22S and G23S for all 150 text files and store these values in an array. The issue here is that each text file stores this info in different lines but in the same order. Thank you for your help!!
Regards,
Ernesto

Best Answer

Something around the following solution would work well:
 n = 150 ;
 e22s = zeros(n,1) ;
 g23s = zeros(n,1) ;
 for k = 1 : n
    fName   = sprintf('myFile_%d.txt', k) ;
    buffer  = fileread(fName) ;
    e22s(k) = str2double(regexp(buffer, '(?<=E22S=\s+)\S+', 'match')) ;
    g23s(k) = str2double(regexp(buffer, '(?<=G23S=\s+)\S+', 'match')) ;    
 end
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