Manipulate binary element in matrix

Hi If i have binary digits in the element.How do i choose element bit 5 to bit 8.

A= 010101010

This A is in binary format.

Answer 1

[KALYAN ACHARJYA]

bin_num=str2num(A);
bin_array=num2str(bin_num)-'0';
bits_selection=bin_array(5:8)

or

bin_data=A-'0'
bits_selection=bin_data(5:8)

[zahrein yaacob]

Thank you very much.

To understand further, how does bin_data=A-'0' can make it as a built array element.