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How to access a table column using a string of the column name

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MathWorks Support Team
回答： MathWorks Support Team 2017-12-20
If you have a table called table1 with column names X1, X2, X3, how can you access a column X1 with the variable v =  'X1'?

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MathWorks Support Team
This can be done using dynamic field indexing.
>> table1.('X1');
If you have a variable that contains the string.
>> v = 'X1';
>> table1.(v);
Note: This indexing also works for dataset arrays and structs.
https://blogs.mathworks.com/loren/2005/12/13/use-dynamic-field-references/

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