Reading varying headerlines length, text files

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Matlab User
Matlab User 2016-8-23
编辑： Matlab User 2016-8-29
Hi, I am trying to read specific part of the header lines for these files and once I read lines i want to increment for each block and display them into GUI edit text boxes.
fid= fopen([FilesToRead, MultipleFiles]);
textForGUI = cell(1);
while true
tLine = fgetl(fid);
headerCells = strsplit(tLine,' ');
if length(headerCells) > 1
if ~isempty(headerCells{2})
if ~strcmpi(headerCells{2},'!User') && ~strcmpi(headerCells{2},'data')
textForGUI(end+1) = headerCells(2);
else
break
end
end
end
end
textForGUI = textForGUI(2:end);
Block=0;
while true
tLine = fgetl(fid);
if ~ischar(tLine)
break;
end
if ~isempty(strfind(tLine,'data'))
Block=Block+1;
if true
% code
end
formatSpec = '%f %f %f %f %f';
C = textscan(fid,formatSpec,24,'CommentStyle','data','Delimiter','\t');
%here I got some calculations and plots
end
end
Thanks!

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采纳的回答

Kelly Kearney
Kelly Kearney 2016-8-23
I usually find the easiest way to do this sort of thing is to read the whole file in as plain text (assuming it's not too large), and then parsing out the bits I want using strfind and regexp as appropriate. Here's an example:
fid = fopen('~/Downloads/Example-2.txt');
tmp = textscan(fid, '%s', 'delimiter', '\n', 'whitespace', '');
tmp = tmp{1};
fclose(fid);
% Figure out where each header section begins and ends
sidx = find(~cellfun('isempty', regexp(tmp, '^\d*\s*\*\*\*letter')));
eidx = find(~cellfun('isempty', regexp(tmp, '^\d*\s*high')));
% Assume data runs from end of one header to beginning of next
dsidx = eidx + 1;
deidx = [sidx(2:end)-1; length(tmp)];
% Loop over blocks
nblock = length(sidx);
C = cell(nblock,1);
textForGUI = cell(nblock,1);
for ii = 1:nblock
% Read the header block and data block
headerlines = tmp(sidx(ii):eidx(ii));
datalines = tmp(dsidx(ii):deidx(ii));
% Throw away the data lines you don't need (!user, data, blank)
datalines = regexprep(datalines, '^\d*', '');
isgood = cellfun('isempty', strfind(datalines, '!user')) & ...
cellfun('isempty', strfind(datalines, 'data')) & ...
~cellfun('isempty', strtrim(datalines));
datalines = sprintf('%s\n', datalines{isgood});
% Read numbers from cleaned-up data block
formatSpec = '%f %f %f %f %f';
C{ii} = textscan(datalines,formatSpec,24,'CommentStyle','data','Delimiter','\t');
textForGUI{ii} = headerlines(2:end);
end

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