www.gusucode.com > MATLAB2008应用程序接口编程技术源码程序 > MATLAB2008应用程序接口编程技术源码程序/code/第2章/2.4/average.m
function y = average(x) %AVERAGE Mean of vector elements. %AVERAGE(X),where X is a vector,is the mean of vector elements. %Non-vecor input results in an error. [m,n] = size(x); if(~((m==1)|(n==1))|(m==1 & n==1)) error(‘Input must be a vector’) end y = sum(x)/length(x);%Actual computation