How to read specific data from a text file
1 vue (au cours des 30 derniers jours)
Afficher commentaires plus anciens
Hello,
I want to read the latitude and longitude values (Station and Epicenter) from the following text file.
...
...
Station 37.94 N 47.54 E Altitude 1699m Azimuth L 0 T 90 Vs30 406
Epicenter 37.99 N 48.15 E FD 28 Km Mb0 Ms0 Mw6 Mn0 ML6.2
...
...
I used the following code for reading geographic coordinate of station
fid=fopen(FileName,'r') ;
text1 = textscan(fid,'%s','Delimiter','','endofline','');
text1 = text1{1}{1};
SLa=regexp(text1,'Station[\s]+(\d*\.?\d+)','tokens') ;
SLa=str2double([SLa{:}])
SLo=regexp(text1,'Station[\s] N +(\d*\.?\d+)','tokens') ;
SLo=str2double([SLo{:}])
and I got the following results
SLa =
37.9400
SLo =
NaN
I think I missed something in line 6, could you please help me to fix it?
Thanks
0 commentaires
Réponse acceptée
Adam Danz
le 23 Mai 2019
Modifié(e) : Adam Danz
le 23 Mai 2019
You should be able to pull both numbers out at the same time with this:
LaLoTokens = regexp(text1,'Station +(\d*\.?\d+) +N +(\d*\.?\d+)', 'tokens');
LaLo = str2double([LaLoTokens{:}{:}]);
% or (depending on how 'text1' is stored)
LaLo = str2double([LaLoTokens{:}]);
Here's a great site to put together regular expressions: https://regex101.com/
2 commentaires
Adam Danz
le 23 Mai 2019
Glad I could help! I always go directly to that regex101 website any time I need to work out an expression.
Plus de réponses (1)
Voir également
Catégories
En savoir plus sur Data Import and Export 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!