Funkce signum a Heaviside

Èesky je to signum anglicky také, dìlá to tohle:

> sgn(-1) = signum(-1);

> sgn( 1) = signum( 1);

> sgn( 0) = signum( 0);

> plot(signum(x),x, color=red,discont=true);

[Maple Math]

[Maple Math]

[Maple Math]

[Maple Plot]

Podobnì funguje funkce Heaviside:

> Heaviside(-1);

> Heaviside( 1);

> Heaviside( 0);

> plot(Heaviside(x),x=-20..20,color=red);

[Maple Math]

[Maple Math]

[Maple Math]

[Maple Plot]

Tedy platí (až na x = 0) [Maple Math] .