matlab字符串单元数组与结构体作业答案

1、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,holdup,holdup;findstr(str,o)%位置ans=1523a=findstr(str,o);n=length(a)%次数n=2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=ihaveadreamcometrue;nlength=length(str);fork=1:nlengthif(k=1|isspace(str(k-1)&(str(k)=a)str(k)=char(double(str(k)-32);endenddis

2、p(str);IHaveADreamComeTrue3.创建2x2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(Ll)=beijing;A(2,1)=BELIING;A(l,2)=uint8(5);A(2,2)=1,2;4,刀cellplot(A)A=A=beijing5BEIJING2x2double4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,ma

3、rk,jimin,number,1,2,3,scores,75,89,82,93,78,90,85,62,77,subject,english,math,chinese,english,math,chinese,english,math,chinese)student=1x3structarraywithfields:namenumberscoressubjectstudent(1)ans=name:bamnumber:1scores:758982subject:english,math,chinesestudent(2)ans=mean(student(1).scores)mean(stud

4、ent(1).scores)name:marknumber:2scores:937890subject:english,math,chinesestudent(3)ans=name:jiminnumber:3scores:856277subject:english,math,chinesesum(student(1).scores)ans=246sum(student(2).scores)ans=261sum(student(3).scores)ans=224ans=82mean(student(2).scores)ans=87mean(student(3).scores)ans=74.666

5、7new,index=sort(student.scores,descend)new=939089858278777562index=462735918student(1).mean=mean(student(1).scores)student(2).mean=mean(student(2).scores)student(3).mean=mean(student(3).scores)student=1x3structarraywithfields:namenumberscoressubjectmeanstudent=1x3structarraywithfields:namenumberscoressubjectmeanstudent=1x3structarraywithfields:namenumberscoressubjectmeanstudent(1)ans=name:bamnumber:1scores:758982subject:english,math,chinesemean:82student(2)ans=name:marknumber:2scores:937890subject:english,math,chinesemean:87student(3)ans=name:jiminnumber:3scores:856277subject:engli