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>> B=yuqori(A)
x = 5
B =
-1 0 0 0 0
-2 1 0 0 0
-2 -1 0 0 0
-2 3 -1 -1 0
1 1 1 -1 -1
triu(A) - buyrug’i esa matritsaning diagonalidan
pastki qismini nollarga
aylantirishni amalga oshiradi.
Misol. Berilgan matritsaning diagonaildan pastki qismini elementlarini 0
bilan almashtirish:
>> A=[-1 2 4 0 3; -2 1 0 3 4; -2 -1 0 -2 1; -2 3 -1 -1 1; 1 1 1 -1 -1]
A =
-1 2 4 0 3
-2 1 0 3 4
-2 -1 0 -2 1
-2 3 -1 -1 1
1 1 1 -1 -1
>>
triu(A)
ans =
-1 2 4 0 3
0 1 0 3 4
0 0 0 -2 1
0 0 0 -1 1
0 0 0 0 -1
Ushbu triu protsedurasini algoritmini o’zimiz tuzib m-faylga yozib chiqamiz
va quyidagi natijalarga erishamiz (3.12-rasm).
3.12-rasm.
26
>> B=pastki(A)
x = 5
A =
-1 2 4 0 3
0 1 0 3 4
0 0 0 -2 1
0 0 0 -1 1
0 0 0 0 -1
RESHAPE - matrisa o’lchamini o’zgartishni amalga oshirdi.
>> A=[-1 0 2 0; 0 1 2 -1; -1 -2 -3 2]
A =
-1 0 2 0
0 1 2 -1
-1 -2 -3 2
>>
reshape(A,2,6) % matritsa elementlarining soniga qarab ixtiyoriy
o`lchamdagi matritsani hosil qiladi.
ans =
-1 -1 1 2 -3 -1
0 0 -2 2 0 2
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