table linear indexing error

Why am I getting an error when trying to linear index into my table?

>> load patients

>> T = table(Gender,Smoker,Height,Weight);

>> T(:,4)(T.Smoker==1)

Error: ()-indexing must appear last in an index expression.

Answer 1

[MathWorks Support Team]

The syntax being used is trying to index into a table that has already been indexed into. Instead, index only once to get the desired behavior:

>> T(T.Smoker==1, 4)

Alternatively, this can be broken up into two lines of code:

>> temp = T(:,4); 
>> temp(T.Smoker==1,:)