Sabre

Sabre manual

• Models fitted by Sabre
• Using sabreR
• Using sabreStata
• Using stand-alone Sabre
  • Introduction
  • Getting started
  • Input and Output
  • Examining and manipulating data
  • Defining, fitting and displaying models
  • Model constants
  • Space restrictions
  • Command line options
  • Accurate arithmetic
  • Sabre command reference
  • Deleted commands
• Data Preparation and Analysis of Panel and Clustered Data
• Sabre history

• A restriction on the total amount of data that can be stored and on the number of measurements/cases.
• A restriction on the number of variables and on the number of parameters that can be estimated in a model.

At any time while using SABRE, typing

DISPLAY LIMITS

will show the current limits on these values and the amount of space that has been used. The value for space is decreased by one for every data item held. In addition to overall space restrictions for the storage of parameter estimates and covariances, there is also a restriction on the maximum number of parameters which can be estimated for each model. This number includes even those parameters which may be aliased for a particular model. You can change these limits when starting Sabre by making use of the command line options dat, obs, var & par.

If you wish to reduce storage requirements while Sabre is running, you may delete variates using

DELETE variables

This may be particularly useful after declaring a factor or transforming a variable where the original variable is no longer needed. Because SABRE stores the whole design matrix it is also worthwhile noting that a factor with n levels takes up n times as much space as a variable (which has only one level).