matlab字符串單元數(shù)組與結(jié)構(gòu)體作業(yè)答案

1、1.編制一個(gè)腳本，查找給定字符串中指定字符出現(xiàn)的次數(shù)和位置；str=hopes,dreams,holdup,holdup;findstr(str,o)%位置ans=1523a=findstr(str,o);n=length(a)%次數(shù)n=2編寫一個(gè)腳本，判斷輸入字符串中每個(gè)單詞的首字母是否為大寫，若不是則將其修改為大寫，其他字母為小寫。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.創(chuàng)建2x2單元數(shù)組，第1、2個(gè)元素為字符串，第三個(gè)元素為整型變量，第四個(gè)元素為雙精度(double)類型，并將其用圖形表示。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創(chuàng)建一個(gè)結(jié)構(gòu)體，用于統(tǒng)計(jì)學(xué)生的情況，包括學(xué)生的姓名、學(xué)號(hào)、各科成績(jī)等。然后使用該結(jié)構(gòu)體對(duì)一個(gè)班級(jí)的學(xué)生成績(jī)進(jìn)行管理，如計(jì)算總分、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