Keep Only Cells With a String Beginning with a Certain Letter

If I have a data-set as follows:

['ABC'; 'ABC'; 'ABC'; 'DEF'; 'DEF'; 'DEF'; 'XYZ'; 'XYZ'; 'XYZ']

How do I only keep rows which contain a string beginning with the letter 'D'?

Regards,

CS

Answer 1

[Adam]

s = ['ABC'; 'ABC'; 'ABC'; 'DEF'; 'DEF'; 'DEF'; 'XYZ'; 'XYZ'; 'XYZ'];
s = s( s(:,1) == 'D',: );

assuming you stated the full complexity of the problem in your question.