Re: while loop through a list

*To*: mathgroup at smc.vnet.net*Subject*: [mg128174] Re: while loop through a list*From*: Ray Koopman <koopman at sfu.ca>*Date*: Fri, 21 Sep 2012 04:13:04 -0400 (EDT)*Delivered-to*: l-mathgroup@mail-archive0.wolfram.com*Delivered-to*: l-mathgroup@wolfram.com*Delivered-to*: mathgroup-newout@smc.vnet.net*Delivered-to*: mathgroup-newsend@smc.vnet.net*References*: <k3c1co$eur$1@smc.vnet.net>

On Sep 19, 1:58 am, "tarpane... at libero.it" <tarpane... at libero.it> wrote: > Hello > i've this problem to solve: > > let us suppose I've a function f which returns a random number and I start > with an intial list of n random number > I would like to check if each one of the element of this list is below zero > and if it is applies the function f till when the new random number is above 0. > This should be repeated for each element of the list such that at the end all > the list random numbers will be above 0. > > Thanks in advance , > Paolo f[] := RandomReal[{-1,1}] t = Table[f[],{n = 5}] {-0.654401,0.694079,0.141754,0.163587,-0.418953} NestWhile[f[]&,#,Negative]& /@ t {0.917314,0.694079,0.141754,0.163587,0.227141}