Variable Types¶
Table 66 shows the different type of script variables that are available in the verbatim sections of PoPy scripts:-
| Type | Description | Defined | Used |
|---|---|---|---|
c[X] (fit script) |
covariates (fit) | data file/PREPROCESS | main sections |
c[X] (gen script) |
covariates (gen) | EFFECTS | main sections |
c[X] |
observations | PREDICTIONS (fit) | PREDICTIONS (gen) |
f[X] |
fixed effects | EFFECTS | MODEL_PARAMS |
r[X] |
random effects | EFFECTS | MODEL_PARAMS |
m[X] |
Model parameters | MODEL_PARAMS | main sections |
w[X] |
Workspace Variables | MODEL_PARAMS | MODEL_PARAMS |
x[NEWIND] |
First row for individual | N/A | MODEL_PARAMS |
d[X] |
Derivatives wrt time | DERIVATIVES | N/A |
s[X] |
States | DERIVATIVES/STATES | DERIVATIVES/PREDICTIONS |
x[TIME] |
Continuous time | N/A | DERIVATIVES |
p[X] |
Predictions | PREDICTIONS | PREDICTIONS |
In Table 66, the ‘Defined’ column shows where a variable of particular type is first declared, typically on the left hand side of an ‘=’ or ‘~’ operator. The ‘Used’ column shows where a variable may be used, typically on the right hand side of an ‘=’ or ‘~’ operator.
Note the entry ‘main sections’ in table Table 66 above means the following sections - MODEL_PARAMS/STATES/DERIVATIVES/PREDICTIONS.