MATLAB: Matlab text file processing

matlab functiontext file

how i can get only the numeric data from a text file ? is that there a predifined matlab function for that ????????????????

thanks in advance

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d=importdata('file.txt')
num=d.data

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MATLAB: Text file data processing

This code works with your original data file (which I uploaded here too). It parses most of the file into a structure, which has size 1-by-(number of measurements). Save the code below in a script and run it:

% Read file into a string:
str = fileread('test.txt');
% Check the number of measurements:
N = sscanf(str,':MSR %d');
[S,E] = regexp(str,'(?<=^# Measurement number).*?^:EOM','lineanchors');
assert(all(N==[numel(S),numel(E)]),'This file is incomplete or corrupted.')
% Preallocate structure:
out(N) = struct();
% Loop over each measurement in the file:
for n = 1:N
    sub = str(S(n):E(n));
    out(n).num = sscanf(sub,'%d');
    % Assign fields and values:
    tkn = regexp(sub,'^%(\w{3})([^#]*?)(#\s.*?)?\s*$','lineanchors','tokens');
    for m = 1:numel(tkn)
        tmp = tkn{m};
        out(n).(tmp{1}) = strtrim(tmp{2});
        if ~isempty(tmp{3})
            out(n).([tmp{1},'_note']) = tmp{3}(3:end);
        end
    end
    % Assign header:
    tmp = regexp(sub,'^#(\s+\w+)+\s+#\s+=','tokens','lineanchors','once');
    out(n).hdr = regexp(strtrim(tmp),'\s+','split');
    % Assign data:
    tmp = regexp(sub,'^=\s+(\s+[\d\.-]+)+\s*$','match','lineanchors');
    out(n).dat = cell2mat(textscan([tmp{:}],'=%f%f%f%f'));
end
%

Explore the structure in your variable viewer, it should be fairly self-explanatory as it uses the same fieldnames as your data file. There are only three new fields: "num" (measurement number), "hdr" (numeric matrix column headers), and "dat" (numeric matrix).

MATLAB: How to import text file data into Matlab

The csvread function would be my initial choice.

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MATLAB: Text file data processing

MATLAB: How to import text file data into Matlab

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