How to avoid Warning when assigning values to a table
28 vues (au cours des 30 derniers jours)
Afficher commentaires plus anciens
Louise Wilson
le 25 Mar 2021
Commenté : Louise Wilson
le 25 Mar 2021
Hello,
I have the attached table. I create an empty table and then add each variable separately from the name of files in a folder, and then assign them one by one for each row. This works, but I get a warning:
'Warning: The assignment added rows to the table, but did not assign values to all of the table's existing variables. Those variables are extended with rows containing default values. '
So even though there are no problems, I would like to do it in the most robust way. How can I avoid the warning? Is there a way to assign all variables at once for each row?
wavTimes.(rec_SN)=[]; %create empty output table
wavTimes.(rec_SN)=array2table(wavTimes.(rec_SN));
%get start and end time of each .wav file in folder
for ii=1:length(d)
disp(d(ii).name);
filename=fullfile(rec, d(ii).name);
split_fn=strsplit(filename,'.');
wav_date=datetime(split_fn{2},'InputFormat','yyMMddHHmmss');
wavTimes.(rec_SN).wavFileName(ii)={d(ii).name};
wavTimes.(rec_SN).wavDateTime(ii)=wav_date;
wavinfo=audioinfo(filename);
wav_length=wavinfo.Duration;
wavTimes.(rec_SN).wavEnd(ii)=wav_date+seconds(wav_length);
end
0 commentaires
Réponse acceptée
Cris LaPierre
le 25 Mar 2021
Modifié(e) : Cris LaPierre
le 25 Mar 2021
The warning is because you are adding the values to a table one by one. When you add the first value in a new row, all columns are assigned a value. The warning is just that, a warning to let you know values were added to the other variables.
Consider rearranging your setup slightly.
%get start and end time of each .wav file in folder
for ii=1:length(d)
disp(d(ii).name);
filename=fullfile(rec, d(ii).name);
split_fn=strsplit(filename,'.');
wav_date=datetime(split_fn{2},'InputFormat','yyMMddHHmmss');
wavFileName(ii)={d(ii).name};
wavDateTime(ii)=wav_date;
wavinfo=audioinfo(filename);
wav_length=wavinfo.Duration;
wavEnd(ii)=wav_date+seconds(wav_length);
end
wavTimes.(rec_SN) = table(wavFileName,wavDateTime,wavEnd);
3 commentaires
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!