Binary to Decimal coversion

Convert Binary to Decimal Equivalent. It also convert fractional binary values.

% BIN2DECIMAL Function convert binary string to decimal equivalent.
% This program also works for fractional binary numbers.
% Input: Binary string
% Output: Decimal equivalent of input Binary string
%
% NOTE: keep format as long for high floating point precision
% >>format long
%
% A white space is assumed to be . (point)
% >>bin2decimal('10101') returns 21
% >>bin2decimal('10.101') returns 2.625000000000000
% >>bin2decimal('10 101') returns 2.625000000000000
% >>bin2decimal('.10101') returns 0.656250000000000
% >>bin2decimal(' 10101') returns 0.656250000000000