Re: Random often fails to return a result

*To*: mathgroup at smc.vnet.net*Subject*: [mg30528] Re: [mg30513] Random often fails to return a result*From*: BobHanlon at aol.com*Date*: Sat, 25 Aug 2001 01:15:10 -0400 (EDT)*Sender*: owner-wri-mathgroup at wolfram.com

In a message dated 2001/8/24 9:58:11 PM, Todd.Flach at dnv.com writes: >I have a non-repeatable error that I wonder if someone can explain. I >am using Random to extract elements of three lists. The Table command >shows essentially how I do this. The output looks OK except sublist 9 >has an element called List instead of returning a value. This >extraction error is occurring randomly. I have examined the three >lists to check if there are any "holes". There are no holes. > >Thanks in advance for any advice! > >Table[{starts[[Random[Integer, 100]]], investmentEnds[[Random[Integer, >100]]], > investmentLevels[[Random[Integer, 100]]]}, {10} ] > >{{1.16922, 2.25868, 8.36433}, {2.10013, 5.63926, 8.81981}, {3.85993, >3.03134, > 3.51252}, {0.0660932, 2.43429, 9.08009}, {0.547191, 2.05618, > 10.5471}, {0.512352, 0.868572, 11.7632}, {0.223057, 5.59492, > 4.31098}, {2.52853, 2.85432, 8.77673}, {3.85993, 2.25868, > List}, {0.179792, 1.03656, 9.36414}} > Random[Integer, max] is equivalent to Random[Integer, {0, max}], that is, you can get the value zero. Table[Random[Integer, 3], {10}] {3, 0, 0, 0, 1, 3, 2, 3, 2, 0} Part 0 is the head. {a, b, c}[[0]] List Use Random[Integer, {1, 100}] Bob Hanlon Chantilly, VA USA