help with euler code

i wrote the following matlab( for a euler) code and i can't get it to plot, or provide a figure w. the results. can anyone help?

function [dy] = y(n,to,t,y0) 

h=[0.1]
t0=0
y0=1
n=50
h=0.1
t=t0
y=y0 

for i=1:n
    k=2-exp(-4*t)-2*y
    y=y+h*k
    t=t+h

plot (t,y) 
sprintf('t',' y')

end

Answer 1

[Walter Roberson]

After the plot() call, add

hold on

Change your sprintf() line to

fprintf('%.14f %.14f\n', t, y);

[Kyle]

thanks for your response. this doesn't seem to work, tho. when i plot, ( w. and w.o the code change) i'm getting a blank graph. any thoughts?

[Walter Roberson]

If you add the "hold on" after the plot() call then the plot is not blank, but the points are not very visible. Try using

plot(t, y, 'r*')

to make the points more visible.