When I try and plot this graph the figre comes up but no graph

m

Answer 1

[Mischa Kim]

Andrew, it's there, just hard to see. Use instead

 plot(a,f,'*b')

[Andrew]

This only gave me a specific point on the plot, I am looking for continuous plot. Thanks for your help.

[Mischa Kim]

Correct. You only get on point, since you can only call the function with a scalar variable a, e.g.

 f(1)

and not a vector. In order to see more points on the plot you'd have to call the function repeatedly, using, for example, a loop:

 for ii = 1:5
   f(ii); 
   hold on; 
 end

Alternatively, you could do

 function [f] = f (a)

 a = a-3*floor(a/3);
 f = 2*sqrt(a).*((0<=a) & (a<=1)) + (3-a).*((1<a) & (a<=3));

 figure(1)
 plot (a,f,'-b')
 xlim([-6,6])
 grid

 end

and call the function with a vector input

 f(0:1:10)