How to plot function(s) with smooth curves

I am trying to plot three different equations onto one figure, and each equation with a smooth curve. Because I need to set the values of the independent variable, I cannot figure out how to make them into smooth curves; instead the graphs are segmented, from point to point. Any tips are greatly appreciated!

Here is my code:

N = 0:0.2:1

f = @(N) N.*(1-N);

g = @(N) N.^(2/3)-N

h = @(N) -N.*log(N)

plot(N, f(N), N, g(N), N, h(N))

Which gives me this figure:

While this is the figure I want:

Answer 1

[Star Strider]

N = linspace(0, 1);

This will produce a vector of 100 points between 0 and 1. See the documentation on linspace for details and other options.