www.gusucode.com > matlab 案例源码 matlab代码程序 > matlab/OverflowAndUnderflowBehaviorExample.m
%% Overflow and Underflow Behavior % Examine the difference between using |hypot| and coding the basic |hypot| % equation in M-code. %% % Create an anonymous function that performs essentially the same basic % function as |hypot|. myhypot = @(a,b)sqrt(abs(a).^2+abs(b).^2); %% % |myhypot| does not have the same consideration for underflow and overflow % behavior that |hypot| offers. %% % Find the upper limit at which |myhypot| returns a useful value. You can % see that this test function reaches its maximum at about |1e154|, % returning an infinite result at that point. myhypot(1e153,1e153) %% myhypot(1e154,1e154) %% % Do the same using the |hypot| function, and observe that |hypot| operates % on values up to about |1e308|, which is approximately equal to the value % for |realmax| on your computer (the largest representable % double-precision floating-point number). hypot(1e308,1e308) %% hypot(1e309,1e309)