RE: RE: 3d table or list to file

*To*: mathgroup at smc.vnet.net*Subject*: [mg34969] RE: [mg34949] RE: [mg34879] 3d table or list to file*From*: "DrBob" <majort at cox-internet.com>*Date*: Sun, 16 Jun 2002 00:24:03 -0400 (EDT)*Reply-to*: <drbob at bigfoot.com>*Sender*: owner-wri-mathgroup at wolfram.com

The self-documenting file idea is a lot simpler this way: resultfile = "restest.txt"; threedlist = {1, {2, {3, 4}}}; f[x_] := Sin[x] SetAttributes[f, Listable] Save[resultfile, {resultfile, threedlist, f}] ClearAll[threedlist, f] Get[resultfile] threedlist ?? f Save writes assignment statements (and other definition information, such as Attributes) for a series of variables. Save puts no semicolon at the end of assignment statements, but when you Get the file later, that doesn't cause any problems, as the file content isn't a compound expression; the statements are separated by newlines. Save appends definitions to the current content of the file, so you may sometimes want to use DeleteFile to empty the file before writing new definitions. In case of a function like f above, that could be important, because you'll otherwise Get old pattern definitions along with the newest. Bobby Treat -----Original Message----- From: Ingolf Dahl [mailto:f9aid at fy.chalmers.se] To: mathgroup at smc.vnet.net Subject: [mg34969] [mg34949] RE: [mg34879] 3d table or list to file Just another method, that I like: threedlist={1,{2,{3,4}}}; resultfile = "c:/restest.txt"; Open[resultfile]; WriteString[resultfile, StringForm["threedlist = ``;\n", InputForm[threedlist]]]; Close[resultfile]; This gives a file with the content threedlist = {1, {2, {3, 4}}}; that is written in the Mathematica language and can be read directly by the command << "c:/restest.txt" By using this method, by writing the output as easily readable Mathematica files, you get easily "self-documented" files, that do not need information about the meaning of the content stored somewhere else. (Such information is called "Exformation" in the notation of the danish philosopher Tor Nørretranders.) You can easily modify your Mathematica file to include more data or comments. You can also easily interpret, read and change the file by a text editor, or reuse the data in other ways. If you just store the data without some labelling or comments, you cannot as easy attach more information, or as easy change the output format, without reformatting all data files you already have written. I have found this method with self-documented data files very useful in storing experimental "raw data", and also used other languages (e.g. Basic) to write such files. Then I can experiment freely with different ways of evaluation of my raw data, without destroying the raw data as such. Ingolf Dahl Chalmers University Sweden -----Original Message----- From: Shawn O'Connor [mailto:soconnor at ccs.nrl.navy.mil] To: mathgroup at smc.vnet.net Subject: [mg34969] [mg34949] [mg34879] 3d table or list to file Is it possible to save 3D lists to file to recall them later. Export/Import does not seem to work for lists with dimensions greater than 2 Thank you.