www.gusucode.com > matlab 案例源码 matlab代码程序 > matlab/DoublePrecisionMachineEpsilonExample.m

    %% Accuracy in Double Precision
% Display the distance from |1.0| to the next largest double-precision number.

% Copyright 2015 The MathWorks, Inc.

d = eps

%%
% |eps| is equivalent to |eps(1.0)| and |eps('double')|.

%%
% Compute |log2(eps)|.
d = log2(eps)

%%
% In base |2|, |eps| is equal to |2^-52|.

%%
% Find the distance from |10.0| to the next largest double-precision
% number.
d = eps(10.0)