Re: ElementData[] Problems
- To: mathgroup at smc.vnet.net
- Subject: [mg106658] Re: ElementData[] Problems
- From: David Bailey <dave at removedbailey.co.uk>
- Date: Wed, 27 Jan 2010 01:44:48 -0500 (EST)
- References: <hjmjc3$a2$1@smc.vnet.net>
Sean McConnell wrote: > Hi, whenever I try to use ElementData[], Mathematica keeps returning > $Failed. > > Do I need to load a particular package before using it like I would with > <<PhysicalConstants` ? > > Thanks for the help! > > Sean. > > All the 'paclet' data sets use the internet to obtain and update their information. This seems to mean that: 1) The first time one is used (or maybe used in a different way), you must be connected to the internet. The information is then cached locally. 2) Subsequently, you can retrieve data without an internet connection, but if you have a weak connection Mathematica may start to access the internet for any updates and then fail if the connection breaks! I have found it best to retrieve any information required by a program, and then store it locally for subsequent use by the program - thus making my software independent of the internet. David Bailey http://www.dbaileyconsultancy.co.uk