Make matlab differentiate until the conditions are met?

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Andy
Andy 2012-10-13
I'm making an application for l'hopital's rule. As anyone with knowledge of calculus, you would differentiate the two functions until one of the functions gives a nonzero limit. My question is how can I do that.
This is the code I have so far:
function y=mylhopital(f,g)
syms x
while(limit(f,x,0)==0 & limit(g,x,0)==0)
f=diff(f(x));
g=diff(g(x));
end
y=limit(f,x,0)/limit(g,x,0);

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Matt Fig
Matt Fig 2012-10-13
编辑：Matt Fig 2012-10-13
If you want to keep differentiating until only one of the functions has a nonzero limit, simply use:
(limit(f,x,0)==0 || limit(g,x,0)==0)
instead of:
(limit(f,x,0)==0 & limit(g,x,0)==0)
By the way, when somebody resolves one of your questions, please select their answer as accepted. You have now asked 4 questions and left them all unresolved even though people took the time to answer for you...

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