Selecting specific values from a structured array
显示 更早的评论
Hi, I have a structured array with 10 fields, each one of which is a 8x1 array of symbolic values. Is there any way I can save to another array the 3rd value only of each one of these fields?
采纳的回答
Durga Yenikepalli
2020-12-17
编辑：Durga Yenikepalli
2020-12-17
Hi Oliver,
I understand that you want to select specific element from a structured array and save it to another array.
We can use ‘a = extractfield(S,name)’ function which returns the field values specified by the field name of structure s, and then try to extract 3rd element from the extracted field values and save to another array. Refer below code.
% Example code
% structured array with 10 fields
s = struct('f1', a1,'f2', a2, 'f3', a3, 'f4', a4, 'f5', a5,'f6', a6, 'f7', a7, 'f8', a8, 'f9', a9, 'f10', a10);
% extracting field names
fieldNames = fieldnames(s);
% preallocating array for better performance
finalArray = zeros(1,10);
% iterate and extract 3rd value from each field
for n =1:numel(fieldNames)
f = extractfield(s, fieldNames{n});
finalArray(n) = f(3);
end
Thanks.
更多回答（0 个）
类别
在 帮助中心 和 File Exchange 中查找有关 Structures 的更多信息
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!
Translated by 
