Using fscanf when some elements are not floating point
2 vues (au cours des 30 derniers jours)
Afficher commentaires plus anciens
Hi there
I am trying to use fscanf to read a measurement text file. The file is a matrix of (480x640) floating point numbers. Normally this would be fine however some elements are strings (in this case 'Bad') - is there a way of reading the file in the same way but replacing 'Bad' with NaN, or a better way of doing this?
Currently I have used the following, which reads to the point of the first 'Bad'.
B=fscanf(fid,'%f ',[480 640])
Many thanks in advance
Jack
0 commentaires
Réponse acceptée
Cedric
le 30 Juil 2013
Modifié(e) : Cedric
le 30 Juil 2013
One way to do it is to start with string replacement.. to illustrate, say that the data file contains
4 5 6 7 8 9
1 2 Bad 4 5 6
Bad 7 8 9 10 11
0 Bad Bad Bad 4 5
then:
>> buffer = fileread('myData.txt') ;
>> buffer = strrep(buffer, 'Bad', 'NaN') ; % or regexprep().
>> sscanf(buffer, '%f', [6 4]).'
ans =
4 5 6 7 8 9
1 2 NaN 4 5 6
NaN 7 8 9 10 11
0 NaN NaN NaN 4 5
1 commentaire
Jan
le 30 Juil 2013
@jnaumann: Just to repeat the obvious solution: Replace the not recognized "Bad" by the recognized "NaN" in the file. Then the reading is straight forward. Sometimes simplicity is really nice. +1
Plus de réponses (0)
Voir également
Catégories
En savoir plus sur Logical 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!