L'Hopital rule

Mfile for aplications this rule.

Answer 1

[Star Strider]

No .m-file needed. You can do a reasonably robust approximation with a simple anonymous funciton:

LHospital = @(f,g,x) (f(x+1E-8) - f(x))./(g(x+1E-8) - f(x));

f = @(x) sin(x);
g = @(x) x;

sin0_by_0 = LHospital(f,g,0)

sin0_by_0 =

       1

The ‘correct’ version requires the Symbolic Math Toolbox.

[Torsten]

Slight correction:

LHospital = @(f,g,x) (f(x+1E-8) - f(x))./(g(x+1E-8) - g(x));

Best wishes

Torsten.

[Star Strider]

Thanks, Torsten.

I need to remember to check for typos, especially when I copy-paste.