plotting two curves together in only one figure for different intervals

There are two mathematical functions in below:

y=-0.6729+4.8266x-0.4855x^2+0.0312x^3  from x=0 to x=33.5
y=-486.39+151.64Ln(x)   from x=33.5 t0 45

Please help me, how can I plot these together in MATLAB?

Answer 1

[Friedrich]

Hi,

maybe like this:

y_1 = @(x) -0.6729+4.8266*x-0.4855*x.^2+0.0312*x.^3
y_2 = @(x) -486.39+151.64*log(x)

x_1 = 0:0.1:33.5;
x_2 = 33.5:0.1:45;

plot(x_1,y_1(x_1),'b',x_2,y_2(x_2),'b')

[mohammad]

Thanks dear Friedrich