won't run euler method

x=0
y=1
a=0
b=5
h=0.1
n=(b-a)/h;
f(x(i),y(i))= -2*y(i)+2-e^(-4*x(i))

for i=1:n
x(i)=a+(i-1)*h
x(i+1)=a+i*h
y(i+1)=y(i)+h*f(x(i),y(i))
end
plot(x,y)
hold on

Answer 1

[Sara]

Is this what you were looking for?

x=0;
y=1;
a=0;
b=5;
h=0.1;
n=(b-a)/h; 

for i=1:n 
    x(i)=a+(i-1)*h;
    x(i+1)=a+i*h;
    f = -2*y(i)+2-exp(-4*x(i));
    y(i+1)=y(i)+h*f;
end
plot(x,y) 
hold on

[Louis]

Thanks, I can finally finish my project!!!!

Answer 2

[Walter Roberson]

In your statement

f(x(i),y(i))= -2*y(i)+2-e^(-4*x(i))

you have not defined "i".

If you are trying to define a function, that is not the correct syntax.

You could use

f = @(x,y) -2*y + 2 - exp(-4*);