why can't I see line in the plot?

x= [-2, 4];

y= 0.6*(x.^3)*(exp(-0.47*x))+1.5*(x.^2)*(exp(-0.6*x));

plot(x,y)

%also I need the plot in this interval [-4:8]; but I want to figure out what is the problem here first

Answer 1

[Akira Agata]

You should slightly modify the second line by:

y= 0.6*(x.^3).*(exp(-0.47*x))+1.5*(x.^2).*(exp(-0.6*x));

Then you can obtain the plot. But to plot a meaningful graph, you should do like this.

x = linspace(-2,4);
y= 0.6*(x.^3).*(exp(-0.47*x))+1.5*(x.^2).*(exp(-0.6*x));
plot(x,y)