| expEndp {randomizeR} | R Documentation |
Representation of exponentially distributed endpoints
Description
Represents exponentially distributed endpoints in clinical trials.
Usage
expEndp(lambda, cenRate, accrualTime = 0, cenTime)
Arguments
lambda |
vector of the exponential rate parameters in each treatment group. |
cenRate |
exponential censoring rate in a survival study. |
accrualTime |
duration of the accrual period in a survival study. |
cenTime |
total duration of a survival study (maximum length of followup). |
Details
The expEnd function is a constructor function
for an S4 object of the class expEnd representing
an exponentially distributed endpoint in a clinical trial.
In conjunction with the assess function, exponential endpoints
admit the calculation of the 'exact' type-I-error probability and power
using an approximation formula.
Value
A S4 object representing
an exponentially distributed endpoint in a clinical trial.
See Also
Compute exact or simulated type-I-error: assess.
Other endpoint types:
normEndp,
survEndp
Examples
# set the parameters of two exponentially distributed endpoints
endp <- expEndp(lambda = c(1, 2), cenTime = 10, cenRate = 0.01)