need help

*To*: mathgroup at smc.vnet.net*Subject*: [mg87308] need help*From*: haitomi <tpnycity at yahoo.com>*Date*: Mon, 7 Apr 2008 05:17:26 -0400 (EDT)

Hello All, I need help with two pure functions 1) Li[Ranlist,x] that return a list of x element selected at random from Ranlist. (Is there any way to gennerate random from Ranlist? For example I have RanList=Range[-100,100]) 2) the function 4Sumf[x] is computing the sum of 4 squares of x. If I have x=1, this function will gennerate 1^2+0^2+0^2+0^2, if x=4 then 2^2+0^2+0^2+0^2, if x=7 then 2^2+1^2+1^2+1^2 Is anyone out there have any ideas? Thanks All, Tomi