How do I read begin to read data after a string?

In a txt file, I want to collect fcz data after "Concrete Stresses", how do I also Import the txt file to do so appropriately.

                               CONCRETE STRESSES
                               *****************

       ELMT       fcx       fcy       fcz       Vcxy      Vcyz      Vcxz
                 (MPa)     (MPa)     (MPa)     (MPa)     (MPa)     (MPa)

         1       0.000     0.000     0.000     0.000     0.000     0.000
         2       0.000     0.000     0.000     0.000     0.000     0.000
         3       0.000     0.000     0.000     0.000     0.000     0.000
         4       0.000     0.000     0.000     0.000     0.000     0.000
         5       0.000     0.000     0.000     0.000     0.000     0.000

Answer 1

[Walter Roberson]

filename = 'ConcreteStresses.txt';
S = fileread(filename);

idx = regexp(S, '^\s*\d', 'once', 'lineanchors');

fmt = repmat('%f', 1, 7);
data = cell2mat( textscan(S(idx:end), fmt) );

fcz = data(:,4);

[Walter Roberson]

In the case where the position of the first line of numeric data is known, it is even easier:

filename = 'ConcreteStresses.txt';
fid = fopen(filename);
fmt = repmat('%f', 1, 7);
data = cell2mat( textscan(fid, fmt, 'headerlines', 6));
fclose(fid);
fcz = data(:,4);