. ([ ]), MATLAB . , , R:
>> R=[3 2 4 1; -3 -6 -5 7; 0 1 8 2]
R=
3 2 4 1
-3 -6 -5 7
0 1 8 2
R , :
>> R (2,:)=[ ]
R=
3 2 4 1
0 1 8 2
>> R (:, 2: 3)=[ ]
R=
3 1
0 2
.
, MATLAB , . , , fliplr, :
>> N=[1 2 3 4; 5 6 7 8; 9 10 11 12]
N=
1 2 3 4
5 6 7 8
9 10 11 12
>> Np=fliplr (N)
Np=
4 3 2 1
8 7 6 5
12 11 10 9
flipud ( ):
>> Np=flipud (N)
Np=
9 10 11 12
5 6 7 8
1 2 3 4
, flipdim (N, dim) dim. , flipdim (N, 1) , flipdim (N, 2) .
rot90 90 :
>> Np=rot90 (N)
Np=
4 8 12
3 7 11
2 6 10
1 5 9
rot90 (N, k) N 90 k , :
>> Np=rot90 (N, 2)
Np=
12 11 10 9
8 7 6 5
4 3 2 1
MATLAB. -, , , , ones zeros, , . , , . , , a :
>> a=ones (1, 3)
a=
1 1 1
ones , , . a.
|
|
|
-, a :
>> a=ones (1, 3)
a=
1 1 1
>> a (3)=0.05;
>> a (2)=-1.4;
>> a (1)=0.8;
MATLAB , , , .
, ones , . , , . , . , ( ), zeros. .
, (:) . 2 7 () 0.1:
>> s=2: 0.1: 7;
, . ( , ). ( , ). ( , ), . , .
MATLAB , , :
>> y=[ ]
y =
[ ]
