Description Usage Arguments Value Author(s) References See Also Examples
'summary' method for class '"drift"'.
1 2 3 4 
object 
an object of class '"drift"', a result of a call to

x 
an object of class '"summary.drift"', a result of a
call to 
digit 
the number of significant digits to use when printing. 
... 
further arguments passed to or from other methods. 
The function 'summary.drift' returns a list of summary values of the group sequential boundary calculations given in 'object'.
Oscar A. Perez and T. Charles Casper [email protected]
Reboussin, D. M., DeMets, D. L., Kim, K. M., and Lan, K. K. G. (2000) Computations for group sequential boundaries using the LanDeMets spending function method. Controlled Clinical Trials, 21:190207.
Fortran program 'ld98' by the same authors as above.
DeMets, D. L. and Lan, K. K. G. (1995) Recent Advances in Clinical Trial Design and Analysis, Thall, P. F. (ed.). Boston: Kluwer Academic Publishers.
Lan, K. K. G. and DeMets, D. L. (1983) Discrete sequential boundaries for clinical trials. Biometrika, 70:65963.
bounds
for computation of boundaries using alpha
spending function method. drift
for exit probabilities given boundaries or drift
(effect) or confidence interval given power.
1  ## See function 'drift'

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