>> a=2+3i
a =
2.0000 + 3.0000i
>> b=5+4i;
>> who
Your variables are:
a ans b
>> 2+2
ans =
4
>> c=1000000
c =
1000000
>> c=1000000000
>> a=2+3i
a =
2.0000 + 3.0000i
>> b=5+4i;
>> who
Your variables are:
a ans b
>> 2+2
ans =
4
>> c=1000000
c =
1000000
>> c=1000000000
c =
1.0000e+009
>> d=1/c
d =
1.0000e-009
>> e
??? Undefined function or variable 'e'.
>> e=0.5
e =
1/2
>> format short
>> e
e =
0.5000
>> a
a =
2.0000 + 3.0000i
>> a=2-5i
a =
2.0000 - 5.0000i
>> a
a =
2.0000 - 5.0000i
>> w=[1 2 3 4 5 6 7 8 9 ]
w =
1 2 3 4 5 6 7 8 9
>> v=[9;8;7;6;5;4;3;2;1]
v =
9
8
7
6
5
4
3
2
1
>> w*v
ans =
165
>> v*w
ans =
9 18 27 36 45 54 63 72 81
8 16 24 32 40 48 56 64 72
7 14 21 28 35 42 49 56 63
6 12 18 24 30 36 42 48 54
5 10 15 20 25 30 35 40 45
4 8 12 16 20 24 28 32 36
3 6 9 12 15 18 21 24 27
2 4 6 8 10 12 14 16 18
1 2 3 4 5 6 7 8 9
>> A=ans
A =
9 18 27 36 45 54 63 72 81
8 16 24 32 40 48 56 64 72
7 14 21 28 35 42 49 56 63
6 12 18 24 30 36 42 48 54
5 10 15 20 25 30 35 40 45
4 8 12 16 20 24 28 32 36
3 6 9 12 15 18 21 24 27
2 4 6 8 10 12 14 16 18
1 2 3 4 5 6 7 8 9
>> w.*v'
ans =
9 16 21 24 25 24 21 16 9
>> w'.*v
ans =
9
16
21
24
25
24
21
16
9
>> w(1)=3
w =
3 2 3 4 5 6 7 8 9
>> w(2:4)=[1 1 1]
w =
3 1 1 1 5 6 7 8 9
>> lenght(w)
??? Undefined function or method 'lenght' for input arguments of type 'double'.
>> length(9)
ans =
1
>> length(w)
ans =
9
>> w(9)=[]
w =
3 1 1 1 5 6 7 8
>> w(9)=[0]
w =
3 1 1 1 5 6 7 8 0
>> w(4:6)=[]
w =
3 1 1 7 8 0
>> w=[w[1 1 1]]
??? w=[w[1 1 1]]
|
Error: Unbalanced or unexpected parenthesis or bracket.
>> w=[w[1 1 1]]
??? w=[w[1 1 1]]
|
Error: Unbalanced or unexpected parenthesis or bracket.
>> sum(2)
ans =
2
>> prod(w)
ans =
0
>> w(6)=-1
w =
3 1 1 7 8 -1
>> prod(w)
ans =
-168
>> w
w =
3 1 1 7 8 -1
>> cumsum(w)
ans =
3 4 5 12 20 19
>> cunmprod(w)
??? Undefined function or method 'cunmprod' for input arguments of type 'double'.
>> cumprod(w)
ans =
3 3 3 21 168 -168
>> mean(w)
ans =
3.1667
>> sum(w)/length(w)
ans =
3.1667
>> std(w)
ans =
3.6009
>> median(w)
ans =
2
>> sort(w)
ans =
-1 1 1 3 7 8
>> min(w)
ans =
-1
>> max(w)
ans =
8
>> mod(w)
??? Error using ==> mod
Not enough input arguments.
>> moda(w)
??? Undefined function or method 'moda' for input arguments of type 'double'.
>> B=[w;w;w]
B =
3 1 1 7 8 -1
3 1 1 7 8 -1
3 1 1 7 8 -1
>> w(1:2:9)
??? Index exceeds matrix dimensions.
>> w(1:2:5)
ans =
3 1 8
>> w(12:length(w))
ans =
Empty matrix: 1-by-0
>> w(2:2:length(w)=[]
??? w(2:2:length(w)=[]
|
Error: The expression to the left of the equals sign is not a valid target for an
assignment.
>> w
w =
3 1 1 7 8 -1
>> w(6:9)=[1 2 3]
??? In an assignment A(I) = B, the number of elements in B and
I must be the same.
>> w(6)=4
w =
3 1 1 7 8 4
>> A
A =
9 18 27 36 45 54 63 72 81
8 16 24 32 40 48 56 64 72
7 14 21 28 35 42 49 56 63
6 12 18 24 30 36 42 48 54
5 10 15 20 25 30 35 40 45
4 8 12 16 20 24 28 32 36
3 6 9 12 15 18 21 24 27
2 4 6 8 10 12 14 16 18
1 2 3 4 5 6 7 8 9
>> min A
ans =
65
>> min(A)
ans =
1 2 3 4 5 6 7 8 9
>> minmin(A)
??? Undefined function or method 'minmin' for input arguments of type 'double'.
>> min(min(A))
ans =
1
>> max(A)
ans =
9 18 27 36 45 54 63 72 81
>> max(max(A))
ans =
81
>> mean(A)
ans =
5 10 15 20 25 30 35 40 45
>> mean(mean(A))
ans =
25
>> sum(A)
ans =
45 90 135 180 225 270 315 360 405
>> a
a =
2.0000 - 5.0000i
>> A
A =
9 18 27 36 45 54 63 72 81
8 16 24 32 40 48 56 64 72
7 14 21 28 35 42 49 56 63
6 12 18 24 30 36 42 48 54
5 10 15 20 25 30 35 40 45
4 8 12 16 20 24 28 32 36
3 6 9 12 15 18 21 24 27
2 4 6 8 10 12 14 16 18
1 2 3 4 5 6 7 8 9
>> sum(sum(A))
ans =
2025
>> A(2,1)=2
A =
9 18 27 36 45 54 63 72 81
2 16 24 32 40 48 56 64 72
7 14 21 28 35 42 49 56 63
6 12 18 24 30 36 42 48 54
5 10 15 20 25 30 35 40 45
4 8 12 16 20 24 28 32 36
3 6 9 12 15 18 21 24 27
2 4 6 8 10 12 14 16 18
1 2 3 4 5 6 7 8 9
>> a
a =
2.0000 - 5.0000i
>> det(A)
ans =
0
>> A(1,:)[]
??? A(1,:)[]
|
Error: Unbalanced or unexpected parenthesis or bracket.
>> A(:,1)=[]
A =
18 27 36 45 54 63 72 81
16 24 32 40 48 56 64 72
14 21 28 35 42 49 56 63
12 18 24 30 36 42 48 54
10 15 20 25 30 35 40 45
8 12 16 20 24 28 32 36
6 9 12 15 18 21 24 27
4 6 8 10 12 14 16 18
2 3 4 5 6 7 8 9
>> det(A)
??? Error using ==> det
Matrix must be square.
>> A(1,:)=[1 1 1 1 1 1 1 1]
A =
1 1 1 1 1 1 1 1
16 24 32 40 48 56 64 72
14 21 28 35 42 49 56 63
12 18 24 30 36 42 48 54
10 15 20 25 30 35 40 45
8 12 16 20 24 28 32 36
6 9 12 15 18 21 24 27
4 6 8 10 12 14 16 18
2 3 4 5 6 7 8 9
>> A(1:2,:)=[]
A =
14 21 28 35 42 49 56 63
12 18 24 30 36 42 48 54
10 15 20 25 30 35 40 45
8 12 16 20 24 28 32 36
6 9 12 15 18 21 24 27
4 6 8 10 12 14 16 18
2 3 4 5 6 7 8 9
>> det(A)
??? Error using ==> det
Matrix must be square.
>> A(1:3,1:3)=eye(3)
A =
1 0 0 35 42 49 56 63
0 1 0 30 36 42 48 54
0 0 1 25 30 35 40 45
8 12 16 20 24 28 32 36
6 9 12 15 18 21 24 27
4 6 8 10 12 14 16 18
2 3 4 5 6 7 8 9
>> diag(A)
ans =
1
1
1
20
18
14
8
>> >> a=2+3i
a =
2.0000 + 3.0000i
>> b=5+4i;
>> who
Your variables are:
a ans b
>> 2+2
ans =
4
>> c=1000000
c =
1000000
>> c=1000000000
c =
1.0000e+009
>> d=1/c
d =
1.0000e-009
>> e
??? Undefined function or variable 'e'.
>> e=0.5
e =
1/2
>> format short
>> e
e =
0.5000
>> a
a =
2.0000 + 3.0000i
>> a=2-5i
a =
2.0000 - 5.0000i
>> a
a =
2.0000 - 5.0000i
>> w=[1 2 3 4 5 6 7 8 9 ]
w =
1 2 3 4 5 6 7 8 9
>> v=[9;8;7;6;5;4;3;2;1]
v =
9
8
7
6
5
4
3
2
1
>> w*v
ans =
165
>> v*w
ans =
9 18 27 36 45 54 63 72 81
8 16 24 32 40 48 56 64 72
7 14 21 28 35 42 49 56 63
6 12 18 24 30 36 42 48 54
5 10 15 20 25 30 35 40 45
4 8 12 16 20 24 28 32 36
3 6 9 12 15 18 21 24 27
2 4 6 8 10 12 14 16 18
1 2 3 4 5 6 7 8 9
>> A=ans
A =
9 18 27 36 45 54 63 72 81
8 16 24 32 40 48 56 64 72
7 14 21 28 35 42 49 56 63
6 12 18 24 30 36 42 48 54
5 10 15 20 25 30 35 40 45
4 8 12 16 20 24 28 32 36
3 6 9 12 15 18 21 24 27
2 4 6 8 10 12 14 16 18
1 2 3 4 5 6 7 8 9
>> w.*v'
ans =
9 16 21 24 25 24 21 16 9
>> w'.*v
ans =
9
16
21
24
25
24
21
16
9
>> w(1)=3
w =
3 2 3 4 5 6 7 8 9
>> w(2:4)=[1 1 1]
w =
3 1 1 1 5 6 7 8 9
>> lenght(w)
??? Undefined function or method 'lenght' for input arguments of type 'double'.
>> length(9)
ans =
1
>> length(w)
ans =
9
>> w(9)=[]
w =
3 1 1 1 5 6 7 8
>> w(9)=[0]
w =
3 1 1 1 5 6 7 8 0
>> w(4:6)=[]
w =
3 1 1 7 8 0
>> w=[w[1 1 1]]
??? w=[w[1 1 1]]
|
Error: Unbalanced or unexpected parenthesis or bracket.
>> w=[w[1 1 1]]
??? w=[w[1 1 1]]
|
Error: Unbalanced or unexpected parenthesis or bracket.
>> sum(2)
ans =
2
>> prod(w)
ans =
0
>> w(6)=-1
w =
3 1 1 7 8 -1
>> prod(w)
ans =
-168
>> w
w =
3 1 1 7 8 -1
>> cumsum(w)
ans =
3 4 5 12 20 19
>> cunmprod(w)
??? Undefined function or method 'cunmprod' for input arguments of type 'double'.
>> cumprod(w)
ans =
3 3 3 21 168 -168
>> mean(w)
ans =
3.1667
>> sum(w)/length(w)
ans =
3.1667
>> std(w)
ans =
3.6009
>> median(w)
ans =
2
>> sort(w)
ans =
-1 1 1 3 7 8
>> min(w)
ans =
-1
>> max(w)
ans =
8
>> mod(w)
??? Error using ==> mod
Not enough input arguments.
>> moda(w)
??? Undefined function or method 'moda' for input arguments of type 'double'.
>> B=[w;w;w]
B =
3 1 1 7 8 -1
3 1 1 7 8 -1
3 1 1 7 8 -1
>> w(1:2:9)
??? Index exceeds matrix dimensions.
>> w(1:2:5)
ans =
3 1 8
>> w(12:length(w))
ans =
Empty matrix: 1-by-0
>> w(2:2:length(w)=[]
??? w(2:2:length(w)=[]
|
Error: The expression to the left of the equals sign is not a valid target for an
assignment.
>> w
w =
3 1 1 7 8 -1
>> w(6:9)=[1 2 3]
??? In an assignment A(I) = B, the number of elements in B and
I must be the same.
>> w(6)=4
w =
3 1 1 7 8 4
>> A
A =
9 18 27 36 45 54 63 72 81
8 16 24 32 40 48 56 64 72
7 14 21 28 35 42 49 56 63
6 12 18 24 30 36 42 48 54
5 10 15 20 25 30 35 40 45
4 8 12 16 20 24 28 32 36
3 6 9 12 15 18 21 24 27
2 4 6 8 10 12 14 16 18
1 2 3 4 5 6 7 8 9
>> min A
ans =
65
>> min(A)
ans =
1 2 3 4 5 6 7 8 9
>> minmin(A)
??? Undefined function or method 'minmin' for input arguments of type 'double'.
>> min(min(A))
ans =
1
>> max(A)
ans =
9 18 27 36 45 54 63 72 81
>> max(max(A))
ans =
81
>> mean(A)
ans =
5 10 15 20 25 30 35 40 45
>> mean(mean(A))
ans =
25
>> sum(A)
ans =
45 90 135 180 225 270 315 360 405
>> a
a =
2.0000 - 5.0000i
>> A
A =
9 18 27 36 45 54 63 72 81
8 16 24 32 40 48 56 64 72
7 14 21 28 35 42 49 56 63
6 12 18 24 30 36 42 48 54
5 10 15 20 25 30 35 40 45
4 8 12 16 20 24 28 32 36
3 6 9 12 15 18 21 24 27
2 4 6 8 10 12 14 16 18
1 2 3 4 5 6 7 8 9
>> sum(sum(A))
ans =
2025
>> A(2,1)=2
A =
9 18 27 36 45 54 63 72 81
2 16 24 32 40 48 56 64 72
7 14 21 28 35 42 49 56 63
6 12 18 24 30 36 42 48 54
5 10 15 20 25 30 35 40 45
4 8 12 16 20 24 28 32 36
3 6 9 12 15 18 21 24 27
2 4 6 8 10 12 14 16 18
1 2 3 4 5 6 7 8 9
>> a
a =
2.0000 - 5.0000i
>> det(A)
ans =
0
>> A(1,:)[]
??? A(1,:)[]
|
Error: Unbalanced or unexpected parenthesis or bracket.
>> A(:,1)=[]
A =
18 27 36 45 54 63 72 81
16 24 32 40 48 56 64 72
14 21 28 35 42 49 56 63
12 18 24 30 36 42 48 54
10 15 20 25 30 35 40 45
8 12 16 20 24 28 32 36
6 9 12 15 18 21 24 27
4 6 8 10 12 14 16 18
2 3 4 5 6 7 8 9
>> det(A)
??? Error using ==> det
Matrix must be square.
>> A(1,:)=[1 1 1 1 1 1 1 1]
A =
1 1 1 1 1 1 1 1
16 24 32 40 48 56 64 72
14 21 28 35 42 49 56 63
12 18 24 30 36 42 48 54
10 15 20 25 30 35 40 45
8 12 16 20 24 28 32 36
6 9 12 15 18 21 24 27
4 6 8 10 12 14 16 18
2 3 4 5 6 7 8 9
>> A(1:2,:)=[]
A =
14 21 28 35 42 49 56 63
12 18 24 30 36 42 48 54
10 15 20 25 30 35 40 45
8 12 16 20 24 28 32 36
6 9 12 15 18 21 24 27
4 6 8 10 12 14 16 18
2 3 4 5 6 7 8 9
>> det(A)
??? Error using ==> det
Matrix must be square.
>> A(1:3,1:3)=eye(3)
A =
1 0 0 35 42 49 56 63
0 1 0 30 36 42 48 54
0 0 1 25 30 35 40 45
8 12 16 20 24 28 32 36
6 9 12 15 18 21 24 27
4 6 8 10 12 14 16 18
2 3 4 5 6 7 8 9
>> diag(A)
ans =
1
1
1
20
18
14
8
>>
??? >> a=2+3i
|
Error: Unexpected MATLAB operator.
>> A
A =
1 0 0 35 42 49 56 63
0 1 0 30 36 42 48 54
0 0 1 25 30 35 40 45
8 12 16 20 24 28 32 36
6 9 12 15 18 21 24 27
4 6 8 10 12 14 16 18
2 3 4 5 6 7 8 9
>> diag(A,1)
ans =
0
0
25
24
21
16
9
>> B=A(2:5,3:6)
B =
0 30 36 42
1 25 30 35
16 20 24 28
12 15 18 21
>> celar(A)
??? Undefined function or method 'celar' for input arguments of type 'double'.
>> celar A
??? Undefined function or method 'celar' for input arguments of type 'char'.
>> clear A
>> A=magic(5)
A =
17 24 1 8 15
23 5 7 14 16
4 6 13 20 22
10 12 19 21 3
11 18 25 2 9
>> SUM(a)
??? Undefined function or method 'SUM' for input arguments of type 'double'.
>> sum(A)
ans =
65 65 65 65 65
>> det(A)
ans =
5.0700e+006
>>A^0.5
Aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
>> a=2+3i
a =
2.0000 + 3.0000i
>> b=5+4i;
>> who
Your variables are:
a ans b
>> 2+2
ans =
4
>> c=1000000
c =
1000000
>> c=1000000000
c =
1.0000e+009
>> d=1/c
d =
1.0000e-009
>> e
??? Undefined function or variable 'e'.
>> e=0.5
e =
1/2
>> format short
>> e
e =
0.5000
>> a
a =
2.0000 + 3.0000i
>> a=2-5i
a =
2.0000 - 5.0000i
>> a
a =
2.0000 - 5.0000i
>> w=[1 2 3 4 5 6 7 8 9 ]
w =
1 2 3 4 5 6 7 8 9
>> v=[9;8;7;6;5;4;3;2;1]
v =
9
8
7
6
5
4
3
2
1
>> w*v
ans =
165
>> v*w
ans =
9 18 27 36 45 54 63 72 81
8 16 24 32 40 48 56 64 72
7 14 21 28 35 42 49 56 63
6 12 18 24 30 36 42 48 54
5 10 15 20 25 30 35 40 45
4 8 12 16 20 24 28 32 36
3 6 9 12 15 18 21 24 27
2 4 6 8 10 12 14 16 18
1 2 3 4 5 6 7 8 9
>> A=ans
A =
9 18 27 36 45 54 63 72 81
8 16 24 32 40 48 56 64 72
7 14 21 28 35 42 49 56 63
6 12 18 24 30 36 42 48 54
5 10 15 20 25 30 35 40 45
4 8 12 16 20 24 28 32 36
3 6 9 12 15 18 21 24 27
2 4 6 8 10 12 14 16 18
1 2 3 4 5 6 7 8 9
>> w.*v'
ans =
9 16 21 24 25 24 21 16 9
>> w'.*v
ans =
9
16
21
24
25
24
21
16
9
>> w(1)=3
w =
3 2 3 4 5 6 7 8 9
>> w(2:4)=[1 1 1]
w =
3 1 1 1 5 6 7 8 9
>> lenght(w)
??? Undefined function or method 'lenght' for input arguments of type 'double'.
>> length(9)
ans =
1
>> length(w)
ans =
9
>> w(9)=[]
w =
3 1 1 1 5 6 7 8
>> w(9)=[0]
w =
3 1 1 1 5 6 7 8 0
>> w(4:6)=[]
w =
3 1 1 7 8 0
>> w=[w[1 1 1]]
??? w=[w[1 1 1]]
|
Error: Unbalanced or unexpected parenthesis or bracket.
>> w=[w[1 1 1]]
??? w=[w[1 1 1]]
|
Error: Unbalanced or unexpected parenthesis or bracket.
>> sum(2)
ans =
2
>> prod(w)
ans =
0
>> w(6)=-1
w =
3 1 1 7 8 -1
>> prod(w)
ans =
-168
>> w
w =
3 1 1 7 8 -1
>> cumsum(w)
ans =
3 4 5 12 20 19
>> cunmprod(w)
??? Undefined function or method 'cunmprod' for input arguments of type 'double'.
>> cumprod(w)
ans =
3 3 3 21 168 -168
>> mean(w)
ans =
3.1667
>> sum(w)/length(w)
ans =
3.1667
>> std(w)
ans =
3.6009
>> median(w)
ans =
2
>> sort(w)
ans =
-1 1 1 3 7 8
>> min(w)
ans =
-1
>> max(w)
ans =
8
>> mod(w)
??? Error using ==> mod
Not enough input arguments.
>> moda(w)
??? Undefined function or method 'moda' for input arguments of type 'double'.
>> B=[w;w;w]
B =
3 1 1 7 8 -1
3 1 1 7 8 -1
3 1 1 7 8 -1
>> w(1:2:9)
??? Index exceeds matrix dimensions.
>> w(1:2:5)
ans =
3 1 8
>> w(12:length(w))
ans =
Empty matrix: 1-by-0
>> w(2:2:length(w)=[]
??? w(2:2:length(w)=[]
|
Error: The expression to the left of the equals sign is not a valid target for an
assignment.
>> w
w =
3 1 1 7 8 -1
>> w(6:9)=[1 2 3]
??? In an assignment A(I) = B, the number of elements in B and
I must be the same.
>> w(6)=4
w =
3 1 1 7 8 4
>> A
A =
9 18 27 36 45 54 63 72 81
8 16 24 32 40 48 56 64 72
7 14 21 28 35 42 49 56 63
6 12 18 24 30 36 42 48 54
5 10 15 20 25 30 35 40 45
4 8 12 16 20 24 28 32 36
3 6 9 12 15 18 21 24 27
2 4 6 8 10 12 14 16 18
1 2 3 4 5 6 7 8 9
>> min A
ans =
65
>> min(A)
ans =
1 2 3 4 5 6 7 8 9
>> minmin(A)
??? Undefined function or method 'minmin' for input arguments of type 'double'.
>> min(min(A))
ans =
1
>> max(A)
ans =
9 18 27 36 45 54 63 72 81
>> max(max(A))
ans =
81
>> mean(A)
ans =
5 10 15 20 25 30 35 40 45
>> mean(mean(A))
ans =
25
>> sum(A)
ans =
45 90 135 180 225 270 315 360 405
>> a
a =
2.0000 - 5.0000i
>> A
A =
9 18 27 36 45 54 63 72 81
8 16 24 32 40 48 56 64 72
7 14 21 28 35 42 49 56 63
6 12 18 24 30 36 42 48 54
5 10 15 20 25 30 35 40 45
4 8 12 16 20 24 28 32 36
3 6 9 12 15 18 21 24 27
2 4 6 8 10 12 14 16 18
1 2 3 4 5 6 7 8 9
>> sum(sum(A))
ans =
2025
>> A(2,1)=2
A =
9 18 27 36 45 54 63 72 81
2 16 24 32 40 48 56 64 72
7 14 21 28 35 42 49 56 63
6 12 18 24 30 36 42 48 54
5 10 15 20 25 30 35 40 45
4 8 12 16 20 24 28 32 36
3 6 9 12 15 18 21 24 27
2 4 6 8 10 12 14 16 18
1 2 3 4 5 6 7 8 9
>> a
a =
2.0000 - 5.0000i
>> det(A)
ans =
0
>> A(1,:)[]
??? A(1,:)[]
|
Error: Unbalanced or unexpected parenthesis or bracket.
>> A(:,1)=[]
A =
18 27 36 45 54 63 72 81
16 24 32 40 48 56 64 72
14 21 28 35 42 49 56 63
12 18 24 30 36 42 48 54
10 15 20 25 30 35 40 45
8 12 16 20 24 28 32 36
6 9 12 15 18 21 24 27
4 6 8 10 12 14 16 18
2 3 4 5 6 7 8 9
>> det(A)
??? Error using ==> det
Matrix must be square.
>> A(1,:)=[1 1 1 1 1 1 1 1]
A =
1 1 1 1 1 1 1 1
16 24 32 40 48 56 64 72
14 21 28 35 42 49 56 63
12 18 24 30 36 42 48 54
10 15 20 25 30 35 40 45
8 12 16 20 24 28 32 36
6 9 12 15 18 21 24 27
4 6 8 10 12 14 16 18
2 3 4 5 6 7 8 9
>> A(1:2,:)=[]
A =
14 21 28 35 42 49 56 63
12 18 24 30 36 42 48 54
10 15 20 25 30 35 40 45
8 12 16 20 24 28 32 36
6 9 12 15 18 21 24 27
4 6 8 10 12 14 16 18
2 3 4 5 6 7 8 9
>> det(A)
??? Error using ==> det
Matrix must be square.
>> A(1:3,1:3)=eye(3)
A =
1 0 0 35 42 49 56 63
0 1 0 30 36 42 48 54
0 0 1 25 30 35 40 45
8 12 16 20 24 28 32 36
6 9 12 15 18 21 24 27
4 6 8 10 12 14 16 18
2 3 4 5 6 7 8 9
>> diag(A)
ans =
1
1
1
20
18
14
8
>> >> a=2+3i
a =
2.0000 + 3.0000i
>> b=5+4i;
>> who
Your variables are:
a ans b
>> 2+2
ans =
4
>> c=1000000
c =
1000000
>> c=1000000000
c =
1.0000e+009
>> d=1/c
d =
1.0000e-009
>> e
??? Undefined function or variable 'e'.
>> e=0.5
e =
1/2
>> format short
>> e
e =
0.5000
>> a
a =
2.0000 + 3.0000i
>> a=2-5i
a =
2.0000 - 5.0000i
>> a
a =
2.0000 - 5.0000i
>> w=[1 2 3 4 5 6 7 8 9 ]
w =
1 2 3 4 5 6 7 8 9
>> v=[9;8;7;6;5;4;3;2;1]
v =
9
8
7
6
5
4
3
2
1
>> w*v
ans =
165
>> v*w
ans =
9 18 27 36 45 54 63 72 81
8 16 24 32 40 48 56 64 72
7 14 21 28 35 42 49 56 63
6 12 18 24 30 36 42 48 54
5 10 15 20 25 30 35 40 45
4 8 12 16 20 24 28 32 36
3 6 9 12 15 18 21 24 27
2 4 6 8 10 12 14 16 18
1 2 3 4 5 6 7 8 9
>> A=ans
A =
9 18 27 36 45 54 63 72 81
8 16 24 32 40 48 56 64 72
7 14 21 28 35 42 49 56 63
6 12 18 24 30 36 42 48 54
5 10 15 20 25 30 35 40 45
4 8 12 16 20 24 28 32 36
3 6 9 12 15 18 21 24 27
2 4 6 8 10 12 14 16 18
1 2 3 4 5 6 7 8 9
>> w.*v'
ans =
9 16 21 24 25 24 21 16 9
>> w'.*v
ans =
9
16
21
24
25
24
21
16
9
>> w(1)=3
w =
3 2 3 4 5 6 7 8 9
>> w(2:4)=[1 1 1]
w =
3 1 1 1 5 6 7 8 9
>> lenght(w)
??? Undefined function or method 'lenght' for input arguments of type 'double'.
>> length(9)
ans =
1
>> length(w)
ans =
9
>> w(9)=[]
w =
3 1 1 1 5 6 7 8
>> w(9)=[0]
w =
3 1 1 1 5 6 7 8 0
>> w(4:6)=[]
w =
3 1 1 7 8 0
>> w=[w[1 1 1]]
??? w=[w[1 1 1]]
|
Error: Unbalanced or unexpected parenthesis or bracket.
>> w=[w[1 1 1]]
??? w=[w[1 1 1]]
|
Error: Unbalanced or unexpected parenthesis or bracket.
>> sum(2)
ans =
2
>> prod(w)
ans =
0
>> w(6)=-1
w =
3 1 1 7 8 -1
>> prod(w)
ans =
-168
>> w
w =
3 1 1 7 8 -1
>> cumsum(w)
ans =
3 4 5 12 20 19
>> cunmprod(w)
??? Undefined function or method 'cunmprod' for input arguments of type 'double'.
>> cumprod(w)
ans =
3 3 3 21 168 -168
>> mean(w)
ans =
3.1667
>> sum(w)/length(w)
ans =
3.1667
>> std(w)
ans =
3.6009
>> median(w)
ans =
2
>> sort(w)
ans =
-1 1 1 3 7 8
>> min(w)
ans =
-1
>> max(w)
ans =
8
>> mod(w)
??? Error using ==> mod
Not enough input arguments.
>> moda(w)
??? Undefined function or method 'moda' for input arguments of type 'double'.
>> B=[w;w;w]
B =
3 1 1 7 8 -1
3 1 1 7 8 -1
3 1 1 7 8 -1
>> w(1:2:9)
??? Index exceeds matrix dimensions.
>> w(1:2:5)
ans =
3 1 8
>> w(12:length(w))
ans =
Empty matrix: 1-by-0
>> w(2:2:length(w)=[]
??? w(2:2:length(w)=[]
|
Error: The expression to the left of the equals sign is not a valid target for an
assignment.
>> w
w =
3 1 1 7 8 -1
>> w(6:9)=[1 2 3]
??? In an assignment A(I) = B, the number of elements in B and
I must be the same.
>> w(6)=4
w =
3 1 1 7 8 4
>> A
A =
9 18 27 36 45 54 63 72 81
8 16 24 32 40 48 56 64 72
7 14 21 28 35 42 49 56 63
6 12 18 24 30 36 42 48 54
5 10 15 20 25 30 35 40 45
4 8 12 16 20 24 28 32 36
3 6 9 12 15 18 21 24 27
2 4 6 8 10 12 14 16 18
1 2 3 4 5 6 7 8 9
>> min A
ans =
65
>> min(A)
ans =
1 2 3 4 5 6 7 8 9
>> minmin(A)
??? Undefined function or method 'minmin' for input arguments of type 'double'.
>> min(min(A))
ans =
1
>> max(A)
ans =
9 18 27 36 45 54 63 72 81
>> max(max(A))
ans =
81
>> mean(A)
ans =
5 10 15 20 25 30 35 40 45
>> mean(mean(A))
ans =
25
>> sum(A)
ans =
45 90 135 180 225 270 315 360 405
>> a
a =
2.0000 - 5.0000i
>> A
A =
9 18 27 36 45 54 63 72 81
8 16 24 32 40 48 56 64 72
7 14 21 28 35 42 49 56 63
6 12 18 24 30 36 42 48 54
5 10 15 20 25 30 35 40 45
4 8 12 16 20 24 28 32 36
3 6 9 12 15 18 21 24 27
2 4 6 8 10 12 14 16 18
1 2 3 4 5 6 7 8 9
>> sum(sum(A))
ans =
2025
>> A(2,1)=2
A =
9 18 27 36 45 54 63 72 81
2 16 24 32 40 48 56 64 72
7 14 21 28 35 42 49 56 63
6 12 18 24 30 36 42 48 54
5 10 15 20 25 30 35 40 45
4 8 12 16 20 24 28 32 36
3 6 9 12 15 18 21 24 27
2 4 6 8 10 12 14 16 18
1 2 3 4 5 6 7 8 9
>> a
a =
2.0000 - 5.0000i
>> det(A)
ans =
0
>> A(1,:)[]
??? A(1,:)[]
|
Error: Unbalanced or unexpected parenthesis or bracket.
>> A(:,1)=[]
A =
18 27 36 45 54 63 72 81
16 24 32 40 48 56 64 72
14 21 28 35 42 49 56 63
12 18 24 30 36 42 48 54
10 15 20 25 30 35 40 45
8 12 16 20 24 28 32 36
6 9 12 15 18 21 24 27
4 6 8 10 12 14 16 18
2 3 4 5 6 7 8 9
>> det(A)
??? Error using ==> det
Matrix must be square.
>> A(1,:)=[1 1 1 1 1 1 1 1]
A =
1 1 1 1 1 1 1 1
16 24 32 40 48 56 64 72
14 21 28 35 42 49 56 63
12 18 24 30 36 42 48 54
10 15 20 25 30 35 40 45
8 12 16 20 24 28 32 36
6 9 12 15 18 21 24 27
4 6 8 10 12 14 16 18
2 3 4 5 6 7 8 9
>> A(1:2,:)=[]
A =
14 21 28 35 42 49 56 63
12 18 24 30 36 42 48 54
10 15 20 25 30 35 40 45
8 12 16 20 24 28 32 36
6 9 12 15 18 21 24 27
4 6 8 10 12 14 16 18
2 3 4 5 6 7 8 9
>> det(A)
??? Error using ==> det
Matrix must be square.
>> A(1:3,1:3)=eye(3)
A =
1 0 0 35 42 49 56 63
0 1 0 30 36 42 48 54
0 0 1 25 30 35 40 45
8 12 16 20 24 28 32 36
6 9 12 15 18 21 24 27
4 6 8 10 12 14 16 18
2 3 4 5 6 7 8 9
>> diag(A)
ans =
1
1
1
20
18
14
8
>>
??? >> a=2+3i
|
Error: Unexpected MATLAB operator.
>> A
A =
1 0 0 35 42 49 56 63
0 1 0 30 36 42 48 54
0 0 1 25 30 35 40 45
8 12 16 20 24 28 32 36
6 9 12 15 18 21 24 27
4 6 8 10 12 14 16 18
2 3 4 5 6 7 8 9
>> diag(A,1)
ans =
0
0
25
24
21
16
9
>> B=A(2:5,3:6)
B =
0 30 36 42
1 25 30 35
16 20 24 28
12 15 18 21
>> celar(A)
??? Undefined function or method 'celar' for input arguments of type 'double'.
>> celar A
??? Undefined function or method 'celar' for input arguments of type 'char'.
>> clear A
>> A=magic(5)
A =
17 24 1 8 15
23 5 7 14 16
4 6 13 20 22
10 12 19 21 3
11 18 25 2 9
>> SUM(a)
??? Undefined function or method 'SUM' for input arguments of type 'double'.
>> sum(A)
ans =
65 65 65 65 65
>> det(A)
ans =
5.0700e+006
>>