How to graph Euler's Method?

I'm not exactly sure how to make a Euler's Method equation in mathlab

I'm given then initial ODE with an initial condition:

dy/dt = y(2 - ty), y(0) = 1'

then i'm supposed to use t = 1, 1.5, 2, and 2.5 with

a) h = .01
b) h=.05
c) h = .1

function r = yexact(t,y0,h) 
r = y0*(2-th);
t = 01:0.5:2.5;
plot(t,yexact(t,1,.01)

this is what i did and thats clearly wrong..any ideas?

[Walter Roberson]

For one thing, t*h rather than th

[Terry]

i fixed all of the technical stuff but im still getting an error that says not enough input arguments

[Doug Hull]

function r = yexact(t,y0,h) 
r = y0*(2-th);
t = 01:0.5:2.5;
plot(t,yexact(t,1,.01)

The plot command is calling yexact (ans is missing a parenthesis). This plot command exists within the yexact function. It is going to get recursive and not likely what you intended.

Answer 1

[Walter Roberson]

When a function has arguments, as yours does, you cannot run it by pressing F5 or using "run" from a menu. Instead you need to go down to the command line and invoke it, such as by

yexact(5:19, -9876, 1E-21)