How to sum the values of a fieldname of struct
14 Ansichten (letzte 30 Tage)
Ältere Kommentare anzeigen
Chao Zhang
am 18 Jul. 2021
Kommentiert: Image Analyst
am 19 Jul. 2021
Hello! I have a struct 'STC_ORE', and I want to calculate the values of fieldname' ORE_TON', so I want a code, but there are some errors. Therefore, could you please give me some solutions to deal with it, thanks!
for ii = 1:size(rock_code,1)
if ~isempty(STC_ORE(ii).ORE_TON)
A=sum([STC_ORE(:).ORE_TON]);
end
end
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/687958/image.jpeg)
0 Kommentare
Akzeptierte Antwort
Image Analyst
am 18 Jul. 2021
You need to add the sum onto the prior value of the sum:
theSum = 0; % Initialize
for ii = 1:size(rock_code,1)
if ~isempty(STC_ORE(ii).ORE_TON)
theSum = theSum + sum([STC_ORE(:).ORE_TON]); % Add onto running total.
end
end
If you need more help, or that doesn't work, attach STC_ORE in a .mat file.
2 Kommentare
Image Analyst
am 19 Jul. 2021
Yeah, but it's not a bad idea to check like you did. Sometimes doing math on null/empty or NaN values will throw an error or make the whole thing be NaN.
Weitere Antworten (0)
Siehe auch
Kategorien
Mehr zu Structures finden Sie in Help Center und File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!