How to read only some lines and skip others
4 vues (au cours des 30 derniers jours)
Afficher commentaires plus anciens
time,n0v_soma,n1v_soma,n2v_soma,n4v_dend,n5v_dend,n6v_dend,n7v_dend,n8v_dend,n9v_dend,n10v_dend,n11v_dend,n12v_dend,n13v_dend,n14v_dend,n15v_dend,n16v_dend,n17v_dend,n18v_dend,n19v_dend,n20v_dend,n21v_dend,n22v_dend,n23v_dend,n0Isyn,n1Isyn,n2Isyn,n0curr,n1curr,n2curr
0,-69.1127,-68.9,-65.2096,-66.5,-66.5,-66.5,-66.5,-66.5,-66.5,-66.5,-66.5,-66.5,-66.5,-66.5,-66.5,-66.5,-66.5,-66.5,-66.5,-66.5,-66.5,-66.5,-66.5,-2,-2,-2,0,0,0
0.027,-69.1062,-68.8937,-65.2083,-66.4966,-66.4966,-66.4966,-66.4966,-66.4966,-66.4966,-66.4966,-66.4966,-66.4966,-66.4966,-66.4966,-66.4966,-66.4966,-66.4966,-66.4966,-66.4966,-66.4966,-66.4966,-66.4966,-66.4966,-2,-2,-2,0,0,0
0.054,-69.0996,-68.8874,-65.2069,-66.4933,-66.4933,-66.4933,-66.4933,-66.4933,-66.4933,-66.4933,-66.4933,-66.4933,-66.4933,-66.4933,-66.4933,-66.4933,-66.4933,-66.4933,-66.4933,-66.4933,-66.4933,-66.4933,-66.4933,-2,-2,-2,0,0,0
0.081,-69.0931,-68.8811,-65.2056,-66.4899,-66.4899,-66.4899,-66.4899,-66.4899,-66.4899,-66.4899,-66.4899,-66.4899,-66.4899,-66.4899,-66.4899,-66.4899,-66.4899,-66.4899,-66.4899,-66.4899,-66.4899,-66.4899,-66.4899,-2,-2,-2,0,0,0
0.108,-69.0865,-68.8747,-65.2043,-66.4866,-66.4866,-66.4866,-66.4866,-66.4866,-66.4866,-66.4866,-66.4866,-66.4866,-66.4866,-66.4866,-66.4866,-66.4866,-66.4866,-66.4866,-66.4866,-66.4866,-66.4866,-66.4866,-66.4866,-2,-2,-2,0,0,0
0.135,-69.08,-68.8684,-65.2029,-66.4833,-66.4833,-66.4833,-66.4833,-66.4833,-66.4833,-66.4833,-66.4833,-66.4833,-66.4833,-66.4833,-66.4833,-66.4833,-66.4833,-66.4833,-66.4833,-66.4833,-66.4833,-66.4833,-66.4833,-2,-2,-2,0,0,0
0.162,-69.0735,-68.8621,-65.2016,-66.48,-66.48,-66.48,-66.48,-66.48,-66.48,-66.48,-66.48,-66.48,-66.48,-66.48,-66.48,-66.48,-66.48,-66.48,-66.48,-66.48,-66.48,-66.48,-66.48,-2,-2,-2,0,0,0
0.189,-69.067,-68.8559,-65.2003,-66.4766,-66.4766,-66.4766,-66.4766,-66.4766,-66.4766,-66.4766,-66.4766,-66.4766,-66.4766,-66.4766,-66.4766,-66.4766,-66.4766,-66.4766,-66.4766,-66.4766,-66.4766,-66.4766,-66.4766,-2,-2,-2,0,0,0
0.216,-69.0605,-68.8496,-65.1989,-66.4733,-66.4733,-66.4733,-66.4733,-66.4733,-66.4733,-66.4733,-66.4733,-66.4733,-66.4733,-66.4733,-66.4733,-66.4733,-66.4733,-66.4733,-66.4733,-66.4733,-66.4733,-66.4733,-66.4733,-2,-2,-2,0,0,0
0.243,-69.054,-68.8433,-65.1976,-66.47,-66.47,-66.47,-66.47,-66.47,-66.47,-66.47,-66.47,-66.47,-66.47,-66.47,-66.47,-66.47,-66.47,-66.47,-66.47,-66.47,-66.47,-66.47,-66.47,-2,-2,-2,0,0,0
I want to read only the first 4 lines and first 4 columns skip the rest and also want to skip the header the output should be like this.
0,-69.1127,-68.9,-65.2096,
0.027,-69.1062,-68.8937,-65.2083
0.054,-69.0996,-68.8874,-65.2069
0.081,-69.0931,-68.8811,-65.2056
0 commentaires
Réponse acceptée
per isakson
le 7 Fév 2017
Modifié(e) : per isakson
le 7 Fév 2017
>> cssm('cssm.txt')
ans =
0 -69.1127 -68.9000 -65.2096
0.0270 -69.1062 -68.8937 -65.2083
0.0540 -69.0996 -68.8874 -65.2069
0.0810 -69.0931 -68.8811 -65.2056
where
function out = cssm( filespec )
fid = fopen( filespec );
cac = textscan( fid, '%f%f%f%f%*[^\n]', 4, 'Delimiter',',' ...
, 'CollectOutput',true, 'Headerlines',1 );
[~] = fclose( fid );
out = cac{:};
end
and cssm.txt contains your data
5 commentaires
Walter Roberson
le 7 Fév 2017
want_rows = 4;
want_cols = 100;
fmt = [repmat('%f', 1, want_cols), '%*[^\n]'];
cac = textscan( fid, fmt, want_rows, 'Delimiter',',' ...
, 'CollectOutput',true, 'Headerlines',1 );
per isakson
le 7 Fév 2017
And combine all of it to
function out = cssm( filespec, want_rows, want_cols )
....
end
Plus de réponses (0)
Voir également
Catégories
En savoir plus sur Large Files and Big Data dans Help Center et File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!