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Function fieldnames - structure functions:
The function fieldnames will return the names of the fields which are contained in the structure variable.
>> pack_fields = fieldnames(package)
pack_fields =
'item_no'
'cost'
'price'
'code'
As the name of the fields is of different lengths, the function fieldnames returns a cell array with the names of the fields.
To refer to the elements the curly braces are used, as pack_fields is a cell array.
For illustration, we can refer to the length of one of the strings as shown below:
>> length(pack_fields{2})
ans =
4
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