matrix operation

sir how to remove a specific element in an row or column matrix that is in a matrix a=[1 3 3 4] how to remove 4Th element so that i need to have answer a=[1 3 3]

Answer 1

[Sean de Wolski]

a = a(1:3);  %glass half full

or

a(4) = []; %glass half empty

Answer 2

[Paulo Silva]

More examples to add to Sean ones

a(end)=[] %remove the last element 

a(a~=1 & a~3)=[] %remove all elements different from 1 and 3

[javeed miyandad]

thank you sir