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Find specific vector in different text files

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Christian
Christian 2017-1-27
评论： Christian 2017-1-27
Hello everybody!
I have several different text-files, which look very similar but have minor differences. I have created a dummy text file, to show you how my files look:
Note: Everything in this dummy is "fake".
Now I have a huge number of files like this. But the only thing I need is the distance vector which is named "Distance" in every file.
I tried this code, but it doesn't work so far:
[pathstr,filename{actualfilenumber},ext] = fileparts(files{actualfilenumber});
complete_file_name{actualfilenumber} = fullfile(Path,char([filename{actualfilenumber},ext]));
actualfile = textscan(complete_file_name{actualfilenumber},'%s');
Distance = double(actualfile(:,find(ismember('Distance',actualfile))));
Any suggestions?
Cheers Christian

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采纳的回答

Guillaume
Guillaume 2017-1-27
filecontent = fileread('DummyText1.txt');
distances = str2double(strsplit(regexp(filecontent, '(?<=Distance.*[\n\r]+)[ 0-9.\n\r]*(?=/Distance)', 'match', 'once', dotexceptnewline')));
distances(isnan(distances)) = [];
As long as the distance numbers are not signed and not in scientific notations. To support signed numbers replace [ 0-9.\n\r] by [-+ 0-9.\n\r]. To support scientific notation in addition, replace it with [-+ 0-9.e\n\r].

更多回答（1 个）

KSSV
KSSV 2017-1-27
fid = fopen('your text file') ;
distance = textscan(fid,'%f','Headerlines',15,'delimiter','\n') ;
fclose(fid) ;
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Christian
Christian 2017-1-27
Well, that does not work:
Attempted to access idx(1); index out of bounds because numel(idx)=0.
Error in Dummy (line 14)
distance = cell2mat(S(idx(1)+1:idx(2)-1));
KSSV
KSSV 2017-1-27
It did work for the dummy text files you have attached....

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