Create a function based on some criteria

Suppose I want to create a function :

y=x^2 for x>5

x^3 for 0<x<=5

-1 for x<0

How to implement this in matlab without using fucntion?

Can it be done in single statement so that I can plot this or use in other functions?

Answer 1

[KSSV]

if x <= 0 
    y = -1 ; 
elseif x > 0 && x <= 5
    y = x^3 ;
elseif x > 5
    y = x^2 ;
end

[Deepro Bardhan]

Now How to plot this ?

[KSSV]

x = 0:0.01:10;
y = zeros(size(x)) ;
y(x <= 0) = -1 ; 
y(x > 0 & x <= 5) = x(x > 0 & x <= 5).^3 ;
y(x > 5) = x(x > 5).^2 ;
plot(x,y)

[Deepro Bardhan]

Thanks . That works!