OPEN
Logically equates a unit number with the name of a text file for INPUT and OUTPUT.
Syntax
OPEN filename, unit, reclength
Parameters
|
filename
|
valid string expression, less than 13 characters
|
|
unit
|
valid numeric expression
|
|
reclength
|
valid numeric
expression; only useful when dealing with old-style or otherwise fixed lengthtext
files; must be specified to randomly write(PRINT) data into a file; otherwise,
writing is sequential; should be 80 when dealing with oldstyle McIDAS
text files, including those created by specifying a DEV=F in McIDAS commands
|
Remarks
When an OPEN statement is executed, the record pointers for input and output are set to point to the first record of the file (record zero). If these options are omitted from the INPUT or PRINT statements, the next record is used.
Example
OPEN "YYEXPLE",10