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weight_grid_table#
View page sourceThe Weight Grid Table#
Discussion#
This table specifies the age-time weighting functions on a grid. It has the following columns:
weight_grid_id#
This column has type integer and is the primary key for
the weight_grid table.
Its initial value is zero, and it increments by one for each row.
weight_id#
This column has type integer and is a
weight_id in the weight table.
Each weight_id value corresponds to a different weighting.
age_id#
This column has type integer and is a
age_id in the age table.
Each age_id value corresponds to a specific age.
time_id#
This column has type integer and is a
time_id in the time table.
Each time_id value corresponds to a specific time.
weight#
This column has type real .
For each row in the table, the value in this column
is the weighting, at the corresponding age and time,
and for the specified weight_id ,
Positive#
If the weight_id for a row appears in the data table or the avgint table , the corresponding weight must be positive (greater than zero).
Rectangular Grid#
For each fixed value of weight_id the set of age_id , time_id pairs is rectangular. In other words, if an age_id value appears, it appears once with each time_id that appears with this weight_id . This also means, if a time_id value appears, it appears once with each age_id that appears with this weight_id .
Example#
The file weight_grid_table.py
contains an example weight_grid table.