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- DAN is capable of using pre-existing files (i.e. files that existed
- before the invocation of DAN) in expressions, provided the data
- conforms to one of the formats described in the User's Manual and
- under the `ASCII_input' topic.
-
- Pre-existing files may be either text files or binary files. Text
- files are created using DAN's editor, your system text editor, the
- WRITE procedure, or one of your application programs.
- +
- Assignment statements create temporary binary files, and these files
- can be made permanent by the SAVE procedure. The format for binary
- files is described in the User's Manual and, for C programmers, in the
- `datarec.h' file on the distribution disk. The `store_data' routine
- (also on the distribution disk in both C source code and compiled
- object module format) may be used in your application program to
- generate DAN compatible binary files.
-
- The READ function must be used to input text files, while binary files
- may be used directly in any DAN expression. A text file may be input
- and the resulting values used to create a temporary binary file. The
- binary file may then be used as a term in subsequent expressions. This
- method is usually more efficient if the binary file is used in multiple
- expressions.
-