Extracting and formatting data from a txt like file
1 view (last 30 days)
Show older comments
Hello, I have a text file that's actually a .hoc file but I can't figure out how to convert it to a different format so I'm trying to extract data from it. I imported it into Matlab and what i have is cell array. the beginning of each cell has some weird text string that is useless to me, i just want the data after it. e.g.
pt3dadd(90.8322,34.7489,83.0711,1.25825,0)
pt3dadd(90.6025,34.8644,83.3744,1.25825,0)
I need to take those points (actually only the first numbers and put them into a new array. should I try to delete the 'pt3dadd' or is there a way I can read it and then ignore that?
0 Comments
Accepted Answer
Cedric
on 19 Aug 2013
Edited: Cedric
on 19 Aug 2013
You can do something like:
fid = fopen('myFile.hoc', 'r') ;
content = textscan(fid, 'pt3dadd(%f,%f,%f,%f,%f)') ;
fclose(fid) ;
and you will have numbers in cell array content.
2 Comments
Cedric
on 19 Aug 2013
Edited: Cedric
on 19 Aug 2013
Ok, so the whole file is not completely structured. Then I'd say that regular expressions would be a good option, e.g.:
% - Read file in one shot.
buffer = fileread('myFile.hoc') ;
% - Extract fields as strings.
pattern = 'pt3dadd\(([\d\.]+),([\d\.]+),([\d\.]+),([\d\.]+),([\d\.]+)' ;
content = regexp(buffer, pattern, 'tokens') ;
% - Restructure cell array and convert to double.
content = reshape([content{:}], 5, []).' ;
content = str2double(content) ;
By the way, did you need more information in this previous thread of yours? : http://www.mathworks.com/matlabcentral/answers/84367-ridiculously-simple-nearest-neighbor-search-3d
More Answers (0)
See Also
Categories
Find more on Data Import and Export in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!