add a new field to structure

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Majid Al-Sirafi
Majid Al-Sirafi 2013-12-4
编辑： Stephen23 2017-12-19
Hi all friends
I have a structure variable; this variable is defined as follows:
Student structure; consists of the following fields
Name
Age
Suppose that I fill it with data (for example five students)
Later I want to add another field (for example degree field) to student structure
How can I do that and fill the degree field with data
Please help me

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Wayne King
Wayne King 2013-12-4
编辑：Wayne King 2013-12-4
teststruct = struct('names',{'bob','dave','sara'});
% now add field called data
[teststruct(:).data] = deal(randn(3,1));
fieldnames(teststruct)
  2 个评论
Kyle Wright
Kyle Wright 2017-12-19
编辑：Kyle Wright 2017-12-19
Is this answer working as intended?
I would assume that you used...
deal(randn(3,1))
...using a "3" so that it would match the length of the struct as it is. However, this code puts the 3x1 array into EACH of the (.data) fields, rather than distributing one of each of the vector to one of each of the (.data) fields.
Stephen23
Stephen23 2017-12-19
编辑：Stephen23 2017-12-19
C = num2cell(randn(3,1));
[teststruct(:).data] = deal(C{:})
How this works is explained in the MATLAB documentation:
https://www.mathworks.com/help/matlab/matlab_prog/comma-separated-lists.html

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更多回答（1 个）

Majid Al-Sirafi
Majid Al-Sirafi 2013-12-4
thank you sir, that is I want
best regards

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