Reading in Data: Method 3: Using a procedure or function One can also write custom functions or procedures to read in data files.
This has returned to IDL a structure more info on -structures- below containing the information on the ascii template. Files may also contain comments, which exist between a user-specified comment string and the corresponding end-of-line.
In order to test your routines, you will need to run your functions on a some standard data. The data in one field must be of, or promotable to, a single type e.
The default is to read up to and including the last record. Adjacent fields may be collected into multi-column fields, called groups.