How do I organize a table using a specified cell array?

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Aryan Cross
Aryan Cross 2020-11-12
评论： Star Strider 2020-11-12
https://www.mathworks.com/help/matlab/matlab_prog/access-data-in-a-table.html
In the example found in this documentation, how would I index the data by Gender? Such as if I wanted a new table selecting only rows with {'Male' } or {'Female'}?
I am wondering if it is different than:
rows = (T.Smoker==true & T.Age<40);
T(rows,:)
as it is a cell. Thank you.

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Star Strider
Star Strider 2020-11-12
One approach is to use the findgroups function:
load patients
T = table(Age,Gender,Height,Weight,Smoker,...
'RowNames',LastName);
[Grp,ID] = findgroups(T.Gender);
Males = T(Grp==2,:);
The ‘ID’ variable indicates that these are sorted lexiically, so 1=Female, and 2=Male.

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