How can i make a changeable function input in a matlab function.

pan
2013 11 8
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更新时间：2013 11 8
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I got this function made to calculate the radical of a standard function f(x)=x^4-x-3 and works fine.. But i want to know if its possible to make my f(x) changeable some way, so i can use this function to calculate any f(x) type.
function xi = midpointf(a,b,N)
ai(1)=a; bi(1)=b;
for i=2:N+1;
xi=(ai(i-1)+bi(i-1))/2;
fx=xi^4-xi-3;
fa=ai(i-1)^4-ai(i-1)-3;
if fx==0
'radical'
xi
elseif fx*fa >0
ai(i)=xi; bi(i)=bi(i-1);
else
ai(i)=ai(i-1); bi(i)=xi;
end
end
'radical'
xi

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Sean de Wolski
Sean de Wolski 2013-11-8

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pan
pan 2013-11-8
you mean i should create a handle before running the function and use the handle as an input, right?
Sean de Wolski
Sean de Wolski 2013-11-8
Yup!
Pass in the function handle and then your solver above will do the same set of instructions on it regardless of what it's actually calculating.
pan
pan 2013-11-8
It worked fine, ty! :) I knew about handle but didn't know how to use it properly :P Had to read more careful.. thanks again

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