Help on this piece-wise function?

I am trying to make a function called f that satisfied the following criteria: For values of x>2, f(x) = x2 For values of x<=2, f(x) = 2x I then need to plot my results from -3 to 5.

Here is what i have so far;

function y = f(x)

% first piece

x1 = x(x > 2);

y(find(x > 2)) = x1 .^ 2;

% second piece

x2 = x(x <= 2);

y(find(x <= 2)) = 2 * x2;

x = -3 : 0.5 : 5;

y = f(x);

plot(x, y)

However i keep getting an error in line three stating... Error in f (line 3) x1 = x(x > 2);

Could i get some help on this?

Answer 1

[Star Strider]

This works:

f = @(x) [(x<=2).*(x*2) + (x>2).*(x.^2)];

x = linspace(-3, 5);

figure(1)
plot(x, f(x))
grid