MATLAB_Basic_operation/Homework_ch2.m at main · QTH1225/MATLAB_Basic_operation · GitHub

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%5.2日作业
%------------------------------分界符----------------------------------%
%Q1
ans=5;
10;
ans+10

%------------------------------分界符----------------------------------%

%Q2
a=[-3:0.1:3];
y=sinh(0.3.*a).*sin(a+0.3)+log((0.3+a)/2)

%------------------------------分界符----------------------------------%

%Q3
A_3=[12,34,-4;34,7,87;3,65,7];
B_3=[1,3,-1;2,0,3;3,-2,7];

disp(A_3*B_3);disp(B_3*A_3);disp(A_3.*B_3);

disp(A_3^3);disp(A_3.^3);

disp(A_3/B_3);disp(B_3\A_3);

disp([A_3,B_3]);
C_3=A_3([1,3],:);
disp([C_3;B_3^2]);

%------------------------------分界符----------------------------------%

%Q4
A_4_12=[1,2,3,4,5;6,7,8,9,10];
A_4_34=A_4_12+10;
A_4_56=A_4_34+10;
A_4=[A_4_12;A_4_34;A_4_56(1,:)]
B_4=[3,0,16;17,-6,9;0,23,-4;9,7,0;4,13,11];

C_4=A_4*B_4;disp(C_4);
D_4=C_4(3:5,2:3)

whos

%------------------------------分界符----------------------------------%
% Q5
A_5=[100:999];
B_5=mod(A_5,21);
[row,col]=find(B_5==0,900);
D_5=length(col)
disp('the number is');disp(D_5);

ch='I love You'
k=find(ch>'A'& ch<'Z')
ch(k)=[]