Введение в Matlab

Ifodalarda qavslarni ochib, ularning hadlarini ixchamlash

expand() buyrug’i bilan amalga oshiriladi:

>> syms x y z a b c d e

>> P=(x+1)*(x-1)*(x^2-x+1)*(x^2+x+1)

P =

(x+1)*(x-1)*(x^2-x+1)*(x^2+x+1)

>> P1=expand(P)

P1 =x^6-1

• Ko’phadlarni ko’paytuvchilarga ajratish uchun esa factor()buyrug’idan foydalanamiz. Masalan:
• >> factor(P1)
• ans =(x+1)*(x-1)*(x^2-x+1)*(x^2+x+1)
• >> factor(x^5-x^4-7*x^3+x^2+6*x)
• ans =x*(x-1)*(x-3)*(x+2)*(x+1)
• Ifodalarni soddalashtirish simplify() yoki simple()buyrug’i bilan malga oshiriladi.Masalan:
• >> P2=(cos(x)-sin(x))*(cos(x)+sin(x))
• P2 =(cos(x)-sin(x))*(cos(x)+sin(x))
• >> simplify(P2)
• ans =2*cos(x)^2-1
• Bundan tashqari, ifodalar ustida shakl almashtirishlarda kerak bo’ladigan collect, numden, horner, subexpr, subs kabi bir qator buyruqlari mavjud va uni mustaqil o’rganishni foydalanuvchiga qoldiramiz.

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