掌握Matlab的结构体的基本操作方法。
掌握Matlab的元胞数组的基本操作方法。
二、实验内容
字符串数组Str=[‘hopes, dreams, hold up, old up’]，查找’O’出现的次数和位置。
现有三个字符串变量s1=“i”，s2=“love”，s3=“matlab7.1”，利用字符串处理函数，将其用空格连接在一起，并字母转换为大写，并将7.1替换为2016a。
Str=’ 1 The existing research is about location tracking either completely indoor or altogether on open air 2 by utilizing various sensors and procedures based on inter-networking or internet of things.’，对该字符串做如下处理：
（1）判断字符串中每个单词的首字母是否大写，若不是则将其修改为大写，其他字母为小写。
（2）统计字符串中的数字和字母的个数。
（3）将字符串中间的空格和数字删除，所有字母倒过来重新排序。
创建一个结构体，用于统计学生的情况，包括学生的姓名、学号、各科成绩等。然后使用该结构体对一个班级的学生的成绩进行管理，如计算总分、平均分、排列名次等。
创建一个2X2的元胞数组，第1、2个元素为字符串，第3元素为整型，第4元素为双精度类型，并将其用图形表示。
>> Str=' 1 The existing research is about location tracking either completely indoor or altogether on open air 2 by utilizing various sensors and procedures based on inter-networking or internet of things.';
k=findstr(Str,' ');
l=length(k);
for j=1:l
if(Str(k(j)+1)>='a'&Str(k(j)+1)<='z')
Str(k(j)+1)=Str(k(j)+1)-'a'+'A';
Str =
1 The Existing Research Is About Location Tracking Either Completely Indoor Or Altogether On Open Air 2 By Utilizing Various Sensors And Procedures Based On Inter-networking Or Internet Of Things.
（2）统计字符串中的数字和字母的个数。
>> Str=' 1 The existing research is about location tracking either completely indoor or altogether on open air 2 by utilizing various sensors and procedures based on inter-networking or internet of things.';
>> k=find(Str>='0'&Str<='9');
>> m=find(Str>='a'&Str<='z');
>> length(k)
ans =
>> length(m)
ans =
（3）将字符串中间的空格和数字删除，所有字母倒过来重新排序。
>> Str=' 1 The existing research is about location tracking either completely indoor or altogether on open air 2 by utilizing various sensors and procedures based on inter-networking or internet of things.';
S=strrep(Str,' ','')
k=find(S>='0'&S<='9');
S(k)='';
revch=S(end:-1:1)
1Theexistingresearchisaboutlocationtrackingeithercompletelyindoororaltogetheronopenair2byutilizingvarioussensorsandproceduresbasedoninter-networkingorinternetofthings.
revch =
.sgnihtfotenretnirognikrowten-retninodesabserudecorpdnasrosnessuoiravgnizilituybrianeponorehtegotlaroroodniyletelpmocrehtiegnikcartnoitacoltuobasihcraesergnitsixeehT
