matlab字符串单元数组与结构体作业答案(共4页)

1、精选优质文档-倾情为你奉上 1.编制一个脚本，查找给定字符串中指定字符出现的次数和位置；str='hopes,dreams,hold up,hold up'>> findstr(str,'o') %位置ans = 2 15 23>> a=findstr(str,'o');n=length(a) %次数n = 32编写一个脚本，判断输入字符串中每个单词的首字母是否为大写，若不是则将其修改为大写，其他字母为小写。>> str='i have a dream come true'nlength=len

2、gth(str);for k=1:nlength if (k=1 | isspace(str(k-1)&&(str(k)<='z'&&str(k)>='a')str(k)=char(double(str(k)-32); endenddisp(str);I Have A Dream Come True3创建2×2 单元数组，第1、2 个元素为字符串，第三个元素为整型变量，第四个元素为双精度（double）类型，并将其用图形表示。>> A=cell(2,2) A(1,1)='beijing&#

3、39; A(2,1)='BEIJING'A(1,2)=uint8(5);A(2,2)=1,2;4,7 cellplot(A)A = A = 'beijing' 5'BEIJING' 2x2 double4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成绩进行管理，如计算总分、平均分、排列名次等。>> student=struct('name','bam','mark','jimin','number'

4、,1,2,3,'scores',75,89,82,93,78,90,85,62,77 ,'subject','english,math,chinese','english,math,chinese','english,math,chinese')student = 1x3 struct array with fields: name number scores subject>> student(1)ans = name: 'bam' number: 1 scores: 75 89 82

5、 subject: 'english,math,chinese'>> student(2)ans = name: 'mark' number: 2 scores: 93 78 90 subject: 'english,math,chinese'>> student(3)ans = name: 'jimin' number: 3 scores: 85 62 77 subject: 'english,math,chinese'>> >> sum(student(1).sc

6、ores)ans = 246>> sum(student(2).scores)ans = 261>> sum(student(3).scores)ans = 224 mean(student(1).scores)ans = 82>> mean(student(2).scores)ans = 87>> mean(student(3).scores)ans = 74.6667>> new,index=sort(student.scores,'descend') new = 93 90 89 85 82 78 77 75 6

7、2index = 4 6 2 7 3 5 9 1 8>> student(1).mean= mean(student(1).scores)student(2).mean=mean(student(2).scores)student(3).mean= mean(student(3).scores)student = 1x3 struct array with fields: name number scores subject meanstudent = 1x3 struct array with fields: name number scores subject meanstud

8、ent = 1x3 struct array with fields: name number scores subject mean>> student(1)ans = name: 'bam' number: 1 scores: 75 89 82 subject: 'english,math,chinese' mean: 82>> student(2)ans = name: 'mark' number: 2 scores: 93 78 90 subject: 'english,math,chinese' mean: 87>> student(3)ans = name: 'jimin' number: 3 scores: 85 62 77 subject: 'english,