fzero.m File Reference

Functions
endif	if (nargin< 2||nargin > 3) print_usage()
endif	if (ischar(fun)) fun
	if (funvalchk) fun
	if (length(x0) > 1) b
else	if (a==0) aa
	if (sign(fa)*sign(fb)<=0) break
endif endfor endif	if (b< a) u
Variables
	function [x, fval, info, output]
	return
endif	funvalchk = strcmpi (optimget (options, "FunValCheck", "off"), "on")
	outfcn = optimget (options, "OutputFcn")
	tolx = optimget (options, "TolX", 0)
	maxiter = optimget (options, "MaxIter", Inf)
	maxfev = optimget (options, "MaxFunEvals", Inf)
persistent	mu = 0.5
endif	info = 0
	niter = 0
	nfev = 0
	x = fval = a = fa = b = fb = NaN
	a = x0(1)
	fa = fun (a)
	fb = fun (b)
else	aa = a
endif for	b
	fu = fa

---

Function Documentation

endif endfor endif if

(

)

if

(

sign(fa)*sign(fb)<=

0

)

else if

(

a

= =0

)

if	(	length(x0)	,
		1
	)

if

(

funvalchk

)

endif if

(

ischar(fun)

)

endif if

(

nargin< 2||nargin >

3

)

---

Variable Documentation

a = x0(1)

function aa = a

b

Initial value:

 [0.9*aa, 1.1*aa, aa-1, aa+1, 0.5*aa 1.5*aa, -aa, 2*aa, -10*aa, 10*aa]
      fb = fun (b)

fa = fun (a)

fb = fun (b)

fu = fa

function[x, fval, info, output]

Initial value:

 fzero (fun, x0, options = struct ())


  if (nargin == 1 && ischar (fun) && strcmp (fun, 'defaults'))
    x = optimset ("MaxIter", Inf, "MaxFunEvals", Inf, "TolX", 0, 
    "OutputFcn", [], "FunValCheck", "off")

endif funvalchk = strcmpi (optimget (options, "FunValCheck", "off"), "on")

endif info = 0

maxfev = optimget (options, "MaxFunEvals", Inf)

maxiter = optimget (options, "MaxIter", Inf)

persistent mu = 0.5

nfev = 0

niter = 0

outfcn = optimget (options, "OutputFcn")

return

tolx = optimget (options, "TolX", 0)

x = fval = a = fa = b = fb = NaN