Text File read and write out
49 views (last 30 days)
Show older comments
Hey guys, I'm new to Matlab, and hoping I can get some some help. I'm trying to read in a text file and write it to the format I want. fileread('file') will give me the following data
1356297 2 0.0521214521 0.0005944170 0.0016546078 0.0125977102
4197358 89 0.0523557459 0.1244454656 -0.164303258 -0.542853886
3679865 104 0.0540524244 -0.015693102 -0.004209815 0.0009847531
I want it to write this data to the following format.
"Node 1356297", "Node 4197358", "Node 3679865"
"<0.0005944170, 0.0016546078, 0.0125977102>", @
"<0.1244454656, -0.164303258, -0.542853886>", @
"<-0.015693102, -0.004209815, 0.0009847531>", @
Thanks, Thuan
2 Comments
Fernando Fernandes
on 24 May 2017
I think you may find your answer here:
https://www.mathworks.com/help/matlab/ref/textread.html
Walter Roberson
on 24 May 2017
textread is not recommended; it has been pretty much replaced by textscan or other routines.
Answers (1)
Walter Roberson
on 24 May 2017
With your regular structure and no headers, you can use load() to read the file.
data = load('file');
ids = data(:,1);
vecs = data(:,4:end);
fid = fopen('Output.txt', 'wt');
fmt = [strjoin( repmat( {'"Node %d"'}, 1, length(ids), ', '), '\n'];
fprintf(fmt, ids);
fmt = ['"<', strjoin( repmat( {'%f'}, 1, size(vecs,2) ), ','), '>" @\n'];
fprintf(fmt, vecs.'); %transpose is important
fclose(fid);
2 Comments
Walter Roberson
on 25 May 2017
If I correctly count there as being 4 header lines, then,
fid = fopen('file', 't');
data = cell2mat( textscan(fid, '', 'HeaderLines', 4, 'CollectOutput', true) );
fclose(fid);
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!