Re: making random matrix
- To: mathgroup at smc.vnet.net
- Subject: [mg70603] Re: making random matrix
- From: dimmechan at yahoo.com
- Date: Sat, 21 Oct 2006 05:13:38 -0400 (EDT)
- References: <eha5d4$b5p$1@smc.vnet.net>
Dear amit below I reply to both of your questions appeared to the forum. --------------------------------------------------------------------------- Amit you did a very common mistake for beginners You use the ( ' ) key instead of the correct (`) key! Try the following command and everything is ok. << Statistics`NormalDistribution` That is the two singles quotes used here are "back quotes" usually found on the same key with ~. They are NOT the single quotes found on the double-quote key. Note that the back-quote character is used to separate the package from the directory name, and at the end in place of .m. See the following link for more information. http://documents.wolfram.com/mathematica/book/section-2.7.9 Following also one of the invaluable suggestions of David Park I recomend you to use the following command in order to load the package. Needs["Statistics'NormalDistribution`"] In this way you avoid conflicts of possible reloading of the package. ------------------------------------------------------------------------------------------------ Quit; Needs["Statistics'NormalDistribution`"] n = 100; A = RandomArray[NormalDistribution[], {n, n}]; Short[A, 10] {{-1.75322,-0.247967,-2.68635,1.29424,0.380364,-1.62125,-0.528304,2.25784,-1.00949,-0.431655,-0.274747,-0.622596,-0.815011,0.256722,0.119237,1.43929,-0.628257,1.02232,0.409955,0.624702,-0.264368,-0.468273,0.681124,?54?,1.325,-0.0422575,0.480458,-0.313436,1.24843,0.795454,0.566263,-0.681634,-0.462671,0.462462,0.712621,0.749601,-0.499914,-0.320854,1.38791,-1.21499,-0.440779,-1.80247,-1.70404,-1.13906,0.8714,-0.242595,-1.81064},?99?} -------------------------------------------------------------------------------------------------------- Regards Dimitris