How can I read all text files in a folder without making a struct?
72 Ansichten (letzte 30 Tage)
Ältere Kommentare anzeigen
Robert
am 18 Jun. 2015
Kommentiert: Alex castilla
am 16 Apr. 2018
Using the function x = dir ('*.txt') gives a struct (1x127)
I want to read my 127 text files (matrices) in individually, not in a struct, how can I do it?
Alternatively how can I extract the 127 matrices from a struct?
Thank you in advance for any help
0 Kommentare
Akzeptierte Antwort
Walter Roberson
am 18 Jun. 2015
x = dir ('*.txt') does return a struct but it is a struct of information about the files, not a struct of the data. It basically tells you want the names of the files are (and sizes and last modified and things like that.) You still need to do the loading.
For example,
dinfo = dir('*.txt');
for K = 1 : length(dinfo)
thisfilename = dinfo(K).name; %just the name
thisdata = load(thisfilename); %load just this file
fprintf( 'File #%d, "%s", maximum value was: %g\n', K, thisfilename, max(thisdata(:)) ); %do something with the data
end
If you already know the names then you don't need to use dir() to tell them to you. For example,
for K = 1 : 42
thisfilename = sprintf('qwerty_%04d.txt', K);
thisdata = load(thisfilename); %load just this file
fprintf( 'File #%d, "%s", maximum value was: %g\n', K, thisfilename, max(thisdata(:)) ); %do something with the data
end
to load qwerty_0001.txt, qwerty_0002.txt ... qwerty_0042.txt
5 Kommentare
Alex castilla
am 16 Apr. 2018
Bearbeitet: Alex castilla
am 16 Apr. 2018
In the "thisfilename " what is the "name"?
Weitere Antworten (0)
Siehe auch
Kategorien
Mehr zu Sequence and Numeric Feature Data Workflows finden Sie in Help Center und File Exchange
Produkte
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!