cos(2*pi) 

format long 

pi 

format rat 

pi 

format short 

355/113 

tan(2) %tangens 

cot(2) %kotangens 

log[10](100) 

log10(100) 

log2(8) 

8^(1/3) 

ans 

c=10:-3:-2 

A=[1:3:8;-2:2:2;-3:-1:-4] 

A=[1:3:8;-2:2:2;-3:-1:-5] 

A' 

rand(2,3) 

rand(4) 

round(rand(3) 

) 

B=rand(4) 

B([1,3],:) 

B(1:3,:) 

format compact 

B 

A 

b=[12 0 -12]' 

x=A\b 

x=linspace(-2,2,11) 

y=x.^2 %f(x)=x^2 

plot(x,y) 

x=linspace(-2,2,101); 

y=x.^2; %f(x)=x^2 

plot(x,y) 

plot(x,y,'o') 

plot(x,y,'o',x,y) 

round(10*rand(5)-5*ones(5)) 

M=round(10*rand(5)-5*ones(5)) 

diag(M) 

M 

diag(diag(M)) 

eig(M) 

M 

sum(M) 

sum(M')' 

M 

sort(M)