Specify a Directory for Save in Mathematica

Considering :

ALLdwafDif[#] & /@ symmetries

Save["ALLL.m", ALLL]

Is there a way to save the results in a particular directory ? It开发者_开发问答 automatically save the results in my user directory now.

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The current working directory is given by Directory[]. You can set it by SetDirectory[]. Alternatively, you can append the directory name to ALLL.m and it works.

eg

f = 5;
Save["~/Desktop/temp.m", f]

does what you'd expect (~ is a shortcut for home directory on most Unices, and mma respects it, so this gets saved on my desktop)

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If you want to change the default working directory permanently you can add something like SetDirectory["new_dir"]; to one of the files $BaseDirectory/Kernel/init.m or $UserBaseDirectory/Kernel/init.m (which one depends on whether you want to change the default directory for all users or for the current user only). Next time you restart Mathematica, Directory[] will then automatically be set to new_dir.

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Save[SystemDialogInput["FileSave", "All.m"], ALLL]

brings up a standard system save-file dialog box and saves your file after you've chosen a location (and a new file name if you have chosen one).

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I find it useful to save data in the same location as the notebook:

f = 5;
Save[FileNameJoin[{NotebookDirectory[], "f.dat"}], f]

Or to save in your (default) Dropbox directory:

Save[FileNameJoin[{$HomeDirectory, "Dropbox", "f.dat"}], f]

I rarely use the directory stack that's controlled by SetDirectory[] and friends.