merge structures together in matlab

In Matlab, you can merge two or more structures together using the struct() and fieldnames() functions. Here is an example:

main.m
% create two sample structures
s1.name = 'John';
s1.age = 25;
s2.name = 'Alice';
s2.age = 30;
s2.city = 'New York';

%combine structures 
fields_s1 = fieldnames(s1);
for i = 1:length(fields_s1)
  s3.(fields_s1{i}) = s1.(fields_s1{i});
end

fields_s2 = fieldnames(s2);
for i = 1:length(fields_s2)
  s3.(fields_s2{i}) = s2.(fields_s2{i});
end
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In this example, s1 and s2 are two sample structures. We want to merge them into a new structure s3.

First, we use the fieldnames() function to extract the field names of s1 and s2. Then, we use a for loop to loop through each element of fields_s1 and fields_s2.

In the first for loop, we add the fields of s1 to the new structure s3. In the second for loop, we add the fields of s2 that do not already exist in s1.

The resulting structure s3 will contain all the fields of both s1 and s2.