Re: Cannot load example data
- To: mathgroup at smc.vnet.net
- Subject: [mg111452] Re: Cannot load example data
- From: Bill Rowe <readnews at sbcglobal.net>
- Date: Mon, 2 Aug 2010 07:03:18 -0400 (EDT)
On 8/1/10 at 4:56 AM, usenet at ffconsultancy.com (Jon Harrop) wrote: >"Bill Rowe" <readnews at sbcglobal.net> wrote in message >news:i30ghk$mea$1 at smc.vnet.net... >>On 7/30/10 at 6:55 AM, usenet at ffconsultancy.com (Jon Harrop) wrote: >>>The Graph Utilities docs have some nice examples but many of them >>>do not run in my copy of Mathematica 7.0.1 (Windows), giving >>>errors like the following when trying to load example data: >>>FetchURL::nofile: File >>>C:\Users\Jon\AppData\Local\Temp\mAC72.tmp\can___61.mtx.gz cannot >>>be opened. >>>Am I doing something wrong or does this simply not work? >>How do you expect anyone to determine whether you are doing >>something wrong when you didn't say what you were doing? You really >>do need to post the code that resulted in the error message if you >>want intelligent answers. >Good point. The following code from the docs fails in the same way: >ExampleData[{"Matrix", "CAN 292"}] There appears to be an issue with the Matrix class of example data. I am able to load the first example data set as follows: ExampleData[ExampleData[class][[1]] where class is one of {"AerialImage","Geometry3D","LinearProgramming","Sound","Statistics","TestA= nimation","TestImage","Text","Texture"} But this fails when class is "Matrix" with the error message you indicated. And since "Matrix" is one of the classes returned by doing ExampleData[] I see no reason for this to fail. And FWIW, I see this using In[1]:= $Version Out[1]= 7.0 for Mac OS X x86 (64-bit) (February 19, 2009) on Mac OS 10.6.4