create a struct with fieldnames in matlab

To create a struct with fieldnames in Matlab, you can use the following methods:

Method 1: Using the struct function

main.m
% Create a struct with fieldnames 'name', 'age', and 'city'
person = struct('name', 'John', 'age', 30, 'city', 'New York');
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In this example, struct is a function that creates a struct with the specified fieldnames and values.

Method 2: Using dot notation

main.m
% Create an empty struct
person = struct();

% Add fieldnames and values using dot notation
person.name = 'John';
person.age = 30;
person.city = 'New York';
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This method creates an empty struct and then adds fieldnames and values using dot notation.

Method 3: Using the fields function

main.m
% Create a cell array of fieldnames
fieldnames = {'name', 'age', 'city'};

% Create a struct with the fieldnames and values
person = struct(fieldnames, {'John', 30, 'New York'});
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In this example, the fields function is not explicitly used, but the fieldnames are passed as a cell array to the struct function.

Note that in all cases, the fieldnames are case-sensitive and must be valid Matlab variable names.