# ddFixed

0th

Percentile

##### Auxiliary Functions for Fixed Effects

Functions used in formula of ddhazard for time-invariant effects. ddFixed_intercept is only used for the intercept.

##### Usage
ddFixed(object)ddFixed_intercept(random_intercept = FALSE)
##### Arguments
object

expression that would be used in formula. E.g. x or poly(x, degree = 3).

random_intercept

TRUE if a zero mean time-varying process should be included at as an additional term. Only relevant in stationary models. See the type argument in PF_EM.

##### Aliases
• ddFixed
• ddFixed_intercept
##### Examples
# NOT RUN {
# we can get a time-invariant effect of x1 by
# }
# NOT RUN {
ddhazard(Surv(stop, event) ~ ddFixed(x1), data)
# }
# NOT RUN {
# all of the calls below will yield the same result with a time-invariant
# intercept:
# }
# NOT RUN {
ddhazard(Surv(stop, event) ~ ddFixed_intercept() + x1, data)
ddhazard(Surv(stop, event) ~ -1 + ddFixed_intercept() + x1, data)
# }

Documentation reproduced from package dynamichazard, version 0.6.6, License: GPL-2

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