How to create a matrix from a txt file with variable column numbers?
1 visualizzazione (ultimi 30 giorni)
Mostra commenti meno recenti
Diogo Nascimento
il 11 Apr 2016
Commentato: Diogo Nascimento
il 12 Apr 2016
Hey there!
I am trying to create a matrix from a txt file that the user inputs that goes like this:
Matrix
4
1 1 3 2 6 1
2 1 4 3 5 2 5
3 1 3 4 8 3
4 1 3 5 1 6
The number in the line after "Matrix" represents the number of lines of the matrix I wanna create.
The number of the 3rd column represent the remaining entries on that line and can only vary between 3 or 4.
I've come up with
tline = fgetl(file);
n = fscanf(file,'%f',1);
matrix = fscanf(file,'%e', [n inf]); % but this puts it into a 1x... Matrix...
Thanks for the help
2 Commenti
Risposta accettata
Walter Roberson
il 12 Apr 2016
tline = fgetl(file);
n = fscanf(file, '%f', 1);
for K = 1 : n
rownum = fscanf(file, '%f', 1);
col_offset = fscanf(file, '%f', 1);
num_ent = fscanf(file, '%f');
data_for_row = fscanf(file, '%f', [1 num_ent]);
data(rownum, col_offset + (0:num_ent-1)) = data_for_row;
end
This will pad shorter rows with 0. I had to guess at the meaning of the fields.
3 Commenti
Walter Roberson
il 12 Apr 2016
Change
num_ent = fscanf(file, '%f');
to
num_ent = fscanf(file, '%f', 1);
Più risposte (0)
Vedere anche
Categorie
Scopri di più su Tables in Help Center e File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!