This is a Classroom License for instructional use only.
Research and commercial use is prohibited.
To get started, select "MATLAB Help" from the Help menu.
>> A=[2 -1 3 -5;1 4 5 -1;1 -5 -2 -4;3 -6 1 -9]
A =
2 -1 3 -5
1 4 5 -1
1 -5 -2 -4
3 -6 1 -9
>> B=[7 8 -1 6]
B =
7 8 -1 6
>> B[7;8;-1;6]
??? B[7;8;-1;6]
|
Error: Missing operator, comma, or semicolon.
>> B=[7;8;-1;6]
B =
7
8
-1
6
>> B=det(A)
B =
0
>> A=[2 -1 3 -5;1 4 5 -1;1 -5 0 -4;3 -6 1 -9]
A =
2 -1 3 -5
1 4 5 -1
1 -5 0 -4
3 -6 1 -9
>> B=[7;8;-1;6]
B =
7
8
-1
6
>> B=det(A)
B =
0
>> A=[2 -1 3 0;1 4 5 -1;1 -5 0 -4;3 -6 1 -9]
A =
2 -1 3 0
1 4 5 -1
1 -5 0 -4
3 -6 1 -9
>> B=[7;8;-1;6]
B =
7
8
-1
6
>> B=det(A)
B =
-180
>> X=A/B
X =
-0.0111 0.0056 -0.0167 0
-0.0056 -0.0222 -0.0278 0.0056
-0.0056 0.0278 0 0.0222
-0.0167 0.0333 -0.0056 0.0500
>> A*B
ans =
-360 180 -540 0
-180 -720 -900 180
-180 900 0 720
-540 1080 -180 1620
>> A=[2 -1 3 0;1 4 5 -1;1 -5 0 -4;3 -6 1 -9]
A =
2 -1 3 0
1 4 5 -1
1 -5 0 -4
3 -6 1 -9
>> B=[7;8;-1;6]
B =
7
8
-1
6
>> d=det(A)
d =
-180
>> X=A\B
X =
4
1
0
0
>> A*X
ans =
7
8
-1
6
>> C=A'
C =
2 1 1 3
-1 4 -5 -6
3 5 0 1
0 -1 -4 -9
>> Y=C*B
Y =
39
-6
67
-58
>> inv(A)
ans =
0.4667 -0.3722 -0.9444 0.4611
-0.0667 0.0056 -0.3889 0.1722
0 0.2500 0.5000 -0.2500
0.2000 -0.1000 0 -0.1000
>> inv(A)*B
ans =
4.0000
1.0000
0
0
>> A(1:2,1:3)
ans =
2 -1 3
1 4 5
>> A(1:2,1:3)=0
A =
0 0 0 0
0 0 0 -1
1 -5 0 -4
3 -6 1 -9
>> This is a Classroom License for instructional use only.
Research and commercial use is prohibited.
To get started, select "MATLAB Help" from the Help menu.
A=[2 -1 3 -5;1 4 5 -1;1 -5 -2 -4;3 -6 1 -9]
A =
2 -1 3 -5
1 4 5 -1
1 -5 -2 -4
3 -6 1 -9
B=[7 8 -1 6]
B =
7 8 -1 6
B[7;8;-1;6]
??? B[7;8;-1;6]
|
Error: Missing operator, comma, or semicolon.
B=[7;8;-1;6]
B =
7
8
-1
6
B=det(A)
B =
0
A=[2 -1 3 -5;1 4 5 -1;1 -5 0 -4;3 -6 1 -9]
A =
2 -1 3 -5
1 4 5 -1
1 -5 0 -4
3 -6 1 -9
B=[7;8;-1;6]
B =
7
8
-1
6
B=det(A)
B =
0
A=[2 -1 3 0;1 4 5 -1;1 -5 0 -4;3 -6 1 -9]
A =
2 -1 3 0
1 4 5 -1
1 -5 0 -4
3 -6 1 -9
B=[7;8;-1;6]
B =
7
8
-1
6
B=det(A)
B =
-180
X=A/B
X =
-0.0111 0.0056 -0.0167 0
-0.0056 -0.0222 -0.0278 0.0056
-0.0056 0.0278 0 0.0222
-0.0167 0.0333 -0.0056 0.0500
A*B
ans =
-360 180 -540 0
-180 -720 -900 180
-180 900 0 720
-540 1080 -180 1620
A=[2 -1 3 0;1 4 5 -1;1 -5 0 -4;3 -6 1 -9]
A =
2 -1 3 0
1 4 5 -1
1 -5 0 -4
3 -6 1 -9
B=[7;8;-1;6]
B =
7
8
-1
6
d=det(A)
d =
-180
X=A\B
X =
4
1
0
0
A*X
ans =
7
8
-1
6
C=A'
C =
2 1 1 3
-1 4 -5 -6
3 5 0 1
0 -1 -4 -9
Y=C*B
Y =
39
-6
67
-58
inv(A)
ans =
0.4667 -0.3722 -0.9444 0.4611
-0.0667 0.0056 -0.3889 0.1722
0 0.2500 0.5000 -0.2500
0.2000 -0.1000 0 -0.1000
inv(A)*B
ans =
4.0000
1.0000
0
0
A(1:2,1:3)
ans =
2 -1 3
1 4 5
A(1:2,1:3)=0
A =
0 0 0 0
0 0 0 -1
1 -5 0 -4
3 -6 1 -9
??? This is a Classroom License for instructional use only.
|
Error: Missing operator, comma, or semicolon.
>>
>>