Re: delay evaluation inside RecurrencTable?

*To*: mathgroup at smc.vnet.net*Subject*: [mg122491] Re: delay evaluation inside RecurrencTable?*From*: DrMajorBob <btreat1 at austin.rr.com>*Date*: Sun, 30 Oct 2011 04:20:59 -0500 (EST)*Delivered-to*: l-mathgroup@mail-archive0.wolfram.com*References*: <201110291107.HAA05177@smc.vnet.net>*Reply-to*: drmajorbob at yahoo.com

rr := RandomReal[{-1, 1}]; RecurrenceTable[{a[n] == 0.8*a[n - 1] + rr, a[0] == 100}, a, {n, 1, 20}] Bobby On Sat, 29 Oct 2011 06:07:35 -0500, Alan <alan.isaac at gmail.com> wrote: > My first attempt to simulate an AR(1) process was > RecurrenceTable[{a[n] == 0.8*a[n - 1] + RandomReal[{-1, 1}], > a[0] == 100}, a, {n, 1, 20}] > which of course failed because RandomReal was only evaluated once. > > Is there some way to get a new evaluation of RandomReal for each n > (*inside* RecurrenceTable)? > > Thanks, > Alan Isaac > > PS Sorry if this repeats. I posted this question days ago and it has not > yet appeared. > -- DrMajorBob at yahoo.com

**References**:**delay evaluation inside RecurrencTable?***From:*Alan <alan.isaac@gmail.com>