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a = 3; a = 5
clear
clc
clear;clc
a = [1,2,3] a = [1 2 3] disp(a)
disp(a);
strcat('字符串1','字符串2')
['字符串1' '字符串2'] ['字符串1','字符串2']
c = 100 num2str(c) disp(['c的取值为' num2str(c)]) disp(strcat('c的取值为', num2str(c)))
A = input('请输入A:'); B = input('请输入B:')
E = [1,2,3] sum(E) E = [1;2;3] sum(E)
clc E = [1,2;3,4;5,6]
a = sum(E) a = sum(E,1)
a = sum(E,2)
a = sum(sum(E)) a = sum(E(:))
clc;A=[1 1 4 1/3 3;1 1 4 1/3 3;1/4 1/4 1 1/3 1/2;3 3 3 1 3;1/3 1/3 2 1/3 1]; A A(2,1) A(3,2)
clc;A A(2,:) A(5,:)
clc;A A(:,1) A(:,3)
clc;A A([2,5],:) A(2:5,:) A(2:2:5,:) 1:3:10 10:-1:1 A(2:end,:) A(2:end-1,:)
clc;A A(:)
clc; A = [1,2,3;4,5,6] B = [1,2,3,4,5,6] size(A) size(B)
[r,c] = size(A)
r = size(A,1) c = size(A,2)
A = [1,2,3;4,5,6] B = repmat(A,2,1) B = repmat(A,3,2)
A = [1,2;3,4] B = [1,0;1,1] A * B inv(B) B * inv(B) A * inv(B) A / B
A = [1,2;3,4] B = [1,0;1,1] A .* B A ./ B
A = [1,2;3,4] A * 2 A .* 2 A / 2 A ./ 2
A = [1,2;3,4] A .^ 2 A ^ 2 A * A
A = [1 2 3 ;2 2 1;2 0 3]
E=eig(A)
[V,D]=eig(A)
clc;X = [1 0 4 -3 0 0 0 8 6] ind = find(X)
ind = find(X,2)
clc;X = [1 -3 0;0 0 8;4 0 6] ind = find(X)
X(4)
[r,c] = find(X) [r,c] = find(X,1)
clc X = [1 -3 0;0 0 8;4 0 6] X > 0 X == 4
a = input('请输入考试分数:') if a >= 85 disp('成绩优秀') elseif a >= 60 disp('成绩合格') else disp('成绩挂科') end
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