【MATLAB编程实例练习】-（32）最长连续数（Longest run of consecutive numbers）

题目

来源于Mathwork上的Cody，Problem 672 - Longest run of consecutive numbers.

Given a vector a, find the number(s) that is/are repeated consecutively most often. For example, if you have
a = [1 2 2 2 1 3 2 1 4 5 1]
The answer would be 2, because it shows up three consecutive times.
If your vector is a row vector, your output should be a row vector. If your input is a column vector, your output should be a column vector. You can assume there are no Inf or NaN in the input. Super (albeit non-scored) bonus points if you get a solution that works with these, though.

代码

function val=longrun(a)
  A(1,1)=a(1);%第一列记录出现的元素
  A(1,2)=1;%第二列记录该元素连续出现的次数
  j=1;
for i=2:length(a)
    if a(i)==a(i-1)
        A(j,2)=A(j,2)+1;%连续出现，第二列+1
    else %新元素出现，对A的第j行初始化
        j=j+1;
        A(j,1)=a(i);
        A(j,