Created
April 13, 2010 23:00
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--f x = exp((-x^2)+2) - x*sin(2*x-3) + 2 | |
-- Incremental | |
r = map (\x -> (f x * f (x+1e-1) < 0,x,(x+1e-1))) [-5,-5+1e-1..5.0] | |
b = filter (\(a,b,c) -> a == True ) r | |
t i n = let m = (n+i)/ 2 | |
in f m | |
-- Algoritmo De Biseccion | |
--Iteraciones n en intervalo a b con una toleracia t (E < TOL > => (b-a)2^n < 10^t | |
interParaTolerancia a b t = (log (b-a) + t*log(10))/log 2 | |
startBisec xi xu i | f xi == 0 = putStrLn ("La raiz esta en "++show xi) | |
| f xu == 0 = putStrLn ("La raiz esta en "++show xu) | |
| f xi * f xu > 0 = putStrLn " Error: No hay raiz es ese intervalo" | |
| otherwise = let m = (xi + xu ) /2 | |
fxm = f m | |
in | |
if fxm == 0 | |
then | |
putStrLn ("El resultado es="++ show m ++ " " ++ "Iteracion "++ show i) | |
else do | |
putStrLn ("xi= " ++ show xi ++ " xu = "++show xu ++" pm=" ++ show m ++" Fxm= "++ show fxm++" Error = NaN " ) | |
if fxm * (f xi) > 0 | |
then | |
bisec m xu fxm i 1 | |
else | |
bisec xi m fxm i 1 | |
--E <-> DC -> 0.5*e-dc ......... Er <-> cs -> 5.0e-cs | |
bisec xi xu xprev i ni | |
| i == ni = putStrLn "El valor no fue encontrado en las iteraciones dadas!!!" | |
| otherwise = let m = (xi+xu)/2 | |
fxm = f m | |
error = abs ((fxm - xprev)) | |
in | |
if fxm == 0 | |
then | |
putStrLn ("El resultado es="++ show m ++ " " ++ "Iteracion "++ show ni) | |
else | |
do | |
putStrLn ("xi= " ++ show xi ++ " xu = "++show xu ++" pm=" ++ show m ++" Fxm= "++ show fxm++" Error="++ show error ) | |
if error < 0.0001 --Tolerancia | |
then | |
putStrLn ("El resultado es="++ show m ++ " " ++ "Iteracion "++ show ni) | |
else | |
if fxm*(f xi) > 0 | |
then | |
bisec m xu fxm i (ni+1) | |
else | |
bisec xi m fxm i (ni+1) | |
----------------- | |
--PUNTO FIJO | |
--g x = exp ((-x^2)-5) - x^2 + 3* x | |
--g x =(5 - log ((x^2) - 2*x)) / x | |
--g x = -sqrt (-5-log((x^2)-2*x)) | |
--g x = x^2-(exp((-x^2)-5)) | |
--g x = exp (- | |
--f x = exp ((-x)) - x | |
--g x = | |
g x = x - ( (exp(((-x^2)-5)) - x^2 + 2*x)/((-2)*exp(((-x^2)-5)) - x^2 + 2)) | |
--f x = undefined | |
--g x = undefined | |
-- Evaluar con almenos 3 puntos | |
f x = ((-0.5*(x^2)) + (2.5 * x )+ 4.5 ) | |
--g x = x - ((f x)/(fp x)) | |
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