## Sabre |

Space restrictions | |

## Sabre manual |
There are two types of space restriction in SABRE.- 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
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 If you wish to reduce storage requirements while Sabre is running, you may delete variates using
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). |

Other links: Centre for e-Science | Centre for Applied Statistics