creating plane piecewise in one plot

I am trying to plane something a piecewise function;

0<x<1 y=3x

1<x<2 y=2x+1

2<x<3 y=6x+1

ı have to plot that one graph, one function.

Answer 1

[Star Strider]

Try this:

f = @(x) (3*x).*((0<x) & (x<=1)) + (2*x+1).*((1<x) & (x<=2)) + (6*x+1).*((2<x) & (x<=3));

x = linspace(0, 3);

plot(x, f(x))
grid