close all
a=-4;
b=pi;
n=100;

h=(b-a)/(n-1);
X=a:h:b;

Y=sin(X).*X+cos(X);

plot(X,Y,'r-')
hold on

Y=cos(X).*X - sin(X);
p=plot(X,Y,'b-');
get(p)
set(p)
axis tight
axis equal
z= axis
axis([-10 10 -7 -7])
title('tytuł y_1^2(x)')
xlabel('y');
ylabel('x');
legend('y_1(x)','y_2(x)');
grid on

%-- 2014-10-13 11:04 --%
A=[3 1; -1 2]
B=[3 1; -1 2; 0 -2]
C=[-1 -2; 1 2]
D=[3 -2 -1; 1 0 1]
a=[2 1]
b=[1;2;3]
c=[-1 3]
A+B
% ponieważ macierze posiadaja rózna ilosc wierszy
A+C
B+D'
-2*B
A*D
a*A
b'
B*D
c^2
A^2
a
A
c
inv(C)
inv(B)
B^-1
inv(C)
C
inv(A*D)
% bo macierz nie jest kwadratowa
det(-2)
% jak edytować elementy
A=[3 4 5 ; 5 45 6 ; 54 6 7 ; 434 43 7 8]
%A(2,3)
A=[1 2 3 4;1 2 3 4;1 2 3 4;1 2 3 4; 1 2 3 4]
A(2)
A(1,:)
% WYCIAGANIE WIERSZA Z MACIERZY
A(1,1:END)
A([1 2],:)
A(1:2:end,:)
A(1:2:end 4,:)
A(2,1)=-5
A(4,:)=5 6 7 8
A(4,:)=[5 6 7 8]
A(4,:)= 0
A(6,:)=-9
A(6,1)=-4
A(7,1)=-6
%usuwanie
A([7 4])=[]
length(A)
norm(b)
%norm dłu wektoora
sum(A)
A
A=[1 2 3; 4 5 6; 7 8 9]
max(A)
min(A)
sort(b)
help sort
B
A
sortrowa(A,1)
sortrows(A,1)
sortrows(A,-1)
A=[3 1; -1 2]
B
C
D
a*c
norm(b)
inv(A)
C'
c
a
a.*c
sum(ans)
det(C)
ronud(20,30)
round(20,30)
E=round(20,30)
c'
inv(A)*c'
inv(B)*b
A.^C
A.^3
A.+c
A.+C
A+C
A.*C
D
D([:,3])=[]
D([2,3])=[]
D([1,3])=[]
D=(:,3)=[]
D(3)=[]
D([3])=[]
D([0,3])=[]
D([1 3])=[]
D(:,[1 3])=[]
D
D=[3 -2 -1; 1 0 1]
E=round(rand(20,30))
sum(sum(E))/(size(E,2))*size(E,2)
A
A - eye(2)
dot(a,c)
% dot iloczyn skalarny
a.*c'
b
sqrt(sum(b.*b))
sqrt(dot(b,b))
B
B(1,3)=b
B=(:,3)=b
B(:,3)=b
E(1:2:end)=0
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