Re: Re: Re: Re: Bug in Import?

*To*: mathgroup at smc.vnet.net*Subject*: [mg54882] Re: [mg54833] Re: [mg54797] Re: [mg54765] Re: Bug in Import?*From*: Chris Chiasson <chris.chiasson at gmail.com>*Date*: Sat, 5 Mar 2005 01:34:27 -0500 (EST)*References*: <cvum3g$bmp$1@smc.vnet.net> <200503010658.BAA25162@smc.vnet.net>*Reply-to*: Chris Chiasson <chris.chiasson at gmail.com>*Sender*: owner-wri-mathgroup at wolfram.com

It seems like a lot of confusion happens because things are undocumented or, more frequently, because people can't find the right documentation in Mathematica help. Maybe we could add a documentation section to that Mathematica wiki site? Maybe WRI should implement an actual help search function? Maybe everyone should search the wolfram website instead of the help file? On Fri, 4 Mar 2005 05:07:32 -0500 (EST), Murray Eisenberg <murray at math.umass.edu> wrote: > _I_ cannot discern what that behavior is; that's why the documentation > would be desirable! All I can really infer so far from the experiments > is that .dat files are not, by default treated as text. > > That the two records of the test .dat file give different results when > imported with the default behavior may or may not be a bug. I don't > know what the format expected of a .dat file is. > > > DrBob wrote: > >>> Rather than a bug, the behavior originally cited would seem to > >>> be a failure of the documentation to describe the default behavior > >>> of Import when the file extension is ".dat". > > > > > > Then describe it, please, so this behavior makes sense. > > > > Bobby > > > > On Wed, 2 Mar 2005 01:26:43 -0500 (EST), Murray Eisenberg > > <murray at math.umass.edu> wrote: > > > >> Here's what I get: > >> > >> $Version > >> 5.1 for Microsoft Windows (October 25, 2004) > >> > >> Export["test.dat", {{"2005-01-24", "2005-02-14"}, > >> {"2005-01-24", "2005-02-14"}}]; > >> > >> Import["test.dat", "Text"] // InputForm > >> "2005-01-24 2005-02-14\n2005-01-24 2005-02-14" > >> > >> Import["test.dat"] > >> {{"2005-01-24", "2005-02-14"}, {2005, -1, -24, 2005, > >> -2, -14}} > >> > >> Rather than a bug, the behavior originally cited would seem to be a > >> failure of the documentation to describe the default behavior of Import > >> when the file extension is ".dat". > >> > >> > >> meznaric wrote: > >> > >>> Hm, this seems strange. I am using 4.1 and what happens is this: > >>> > >>> Export["R:\\test.dat", > >>> {{"2005-01-24", "2005-02-14"}, > >>> { "2005-01-24", "2005-02-14"}}] > >>> > >>> Import["R:\\test.dat"] > >>> {{1980, 1989}, {1980, 1989}} > >>> > >>> !! R:\\test.dat > >>> 2005-01-24 2005-02-14 > >>> 2005-01-24 2005-02-14 > >>> > >>> In the Import case Mathematica seems to have actually evaluated those > >>> cells as if they hadn't been strings, but integers. > >>> > >>> In your case, it certainly seems to be a bug, though. How can two > >>> identical list parts be exported/imported in a different way? > >>> > >>> Regards, > >>> Sebastjan Meznaric > >>> > >>> > >> > > > > > > > > -- > Murray Eisenberg murray at math.umass.edu > Mathematics & Statistics Dept. > Lederle Graduate Research Tower phone 413 549-1020 (H) > University of Massachusetts 413 545-2859 (W) > 710 North Pleasant Street fax 413 545-1801 > Amherst, MA 01003-9305 > > -- Chris Chiasson Kettering University Mechanical Engineering Graduate Student 1 810 265 3161

**Follow-Ups**:**Re: Re: Re: Re: Re: Bug in Import?***From:*Murray Eisenberg <murray@math.umass.edu>

**References**:**Re: Bug in Import?***From:*"meznaric" <meznaric@gmail.com>