How to |
Locate and Use Files
offers support for a large number of file formats for importing, exporting, or other operations. It has several standard locations where it looks for files. You can change these locations to place other directories in Mathematica
's default search path.
is able to use files without the full file path specified. However, the files must be located in one of the directories that Mathematica
searches for files.
By default, Mathematica
is able to use files in the directories that appear in $Path
is also able to use files located in your current working directory without a full file path.
View your current working directory by evaluating Directory
You can see a list of all files in the current working directory by evaluating FileNames
You can view the file names you want by using wildcards:
There are a number of methods you can use to access a file if it is in a directory that is not on $Path
or in your current working directory.
For example, you can specify the full path of a file or folder that you want to use. See How to: Insert a File Path
to view the different methods available for doing this.
Specify the full file path:
Or, use SetDirectory
to change your current working directory:
To use a file that is in one of the directories on $Path
or your current working directory, you only need to specify the name of the file.
Import the file
from the current working directory:
to reset the current working directory to its previous value:
You can also append a directory to $Path
and the directory path:
You can now import
without changing your current working directory:
Note that the change to $Path
is temporary, and the value is reset when you restart Mathematica
or the kernel.
To make the change permanent, you can add the previous AppendTo
command to one of the following two init.m
files. Here, FileNameJoin
is used to construct a full file path from $UserBaseDirectory
Just like $Path
, and $BaseDirectory
, other system variables can be used to construct file paths. Some commonly used system variables that represent directories are $RootDirectory
, and $InstallationDirectory