No output from a for and elseif loop
2 visualizzazioni (ultimi 30 giorni)
Mostra commenti meno recenti
Mohammad R. Ghassemi
il 15 Ott 2021
Commentato: Mohammad R. Ghassemi
il 15 Ott 2021
Hi,
I am trying to get the J matrix from the following simple code, however I receive no output for J:
str=readline('1C1S.txt','all');
P=strfind(str,'w');
for x=1:numel(str)
if isempty(P(x,1))
J=1;
elseif isequal(P(x,1),[9])
J=2;
elseif isequal(P(x,1),[4])
J=3;
elseif isequal(P(x,1),[4 9])
J=4;
end
end
2 Commenti
Walter Roberson
il 15 Ott 2021
What is readline() ? The readline() functions I can find in MATLAB require serial port or tcp port, and do not have a 'all' parameter.
Risposta accettata
DGM
il 15 Ott 2021
Modificato: DGM
il 15 Ott 2021
That should be readlines().
P is a cell array of numeric vectors, so address it accordingly.
Any assignment to J overwrites the prior value in J.
The case where none of the conditional tests is true is not handled.
The equality tests are probably wrong, but since there's no description of the intended logic, I don't know what to tell you.
To summarize:
isequal(P(x,1),[4 9])
is never true, because P(x,1) is a cell scalar, which is never equal to any numeric vector.
isequal(P{x,1},[4 9])
is only true if the vector in P{x,1} is identical to [4 9]. That is, it needs to be the same length and all elements must match.
2 Commenti
Più risposte (0)
Vedere anche
Categorie
Scopri di più su Logical 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!