Základní operace

4+6+2
4*25 + 6*22
a = 4
b = 6
c = a + b
who, whos
clear a
clear
ans, pi, eps, inf, NaN, i(j), realmin, realmax
x = sqrt(2)/2
y = asin(x)
y_deg = y*180/pi
c1 = 1-2i
c1 = 1-2j
c2 = 3*(2-sqrt(-1)*3)
c3 = sqrt(-2)
c6 = (c1+c2)/c3  % from the above data
check = i^2 
check = real(check)

help sqrt
help
help topic
lookfor complex

[1 -2i 3 4 5+6i], [1-2i 3 4 5+6i], [(1 -2i) 3 4 5+6i], 
x = [4 1 sqrt(2) sin(0.5) 23.2]

x = [0 0.1*pi 0.2*pi 0.3*pi 0.4*pi 0.5*pi 0.6*pi 0.7*pi 0.8*pi 0.9*pi pi]
y = sin(x)
x(3)
y(5)
1:5, x(1:5)
3:-1:1, y(3:-1:1)
2:2:7, x(2:2:7)
y([8 2 9 1])

0:0.1:1, x = (0:0.1:1)*pi
x = linspace(0, pi, 11)
logspace(0, 2, 11)
a = 1:5, b = 1:2:9
c = [b a]
d = [a(1:2:5) 1 0 1]

a-2
2*a-1

a+b
ans-b
2*a-b
a*b
a.*b
a./b, b.\a
a/b, a\b
a.^2
2.^a
b.^a
b.^(a-3) 

c = [1;2;3;4;5]
a = 1:5
b = a'
c = b'
c = a.'
d = a + i*a
e = d', f = d.'
g = [1 2 3 4; 5 6 7 8]
g = [1 2 3 4
5 6 7 8
9 10 11 12]

h = [1 2 3; 4 5 6 7]

x = linspace(0, 2*pi, 30);
y = sin(x);
plot(x, y)
z = cos(x);
plot(x,y, x,z)
plot(x,y, x,y,'+')
plot(y,z)
plot(x,y, x,2*y.*z,'--')
grid
xlabel('nezavisle promenna x'
ylabel('zavisle promenna'
title('2sin(x)cos(x) = sin(2x)')
plot3(y,z,x), grid

what, dir, ls, type test, delete test, cd path, chdir path, cd, pwd, which test