| concordancefit {survival} | R Documentation |
Compute the concordance
Description
This is the working routine behind the concordance function. It
is not meant to be called by users, but is available for other packages
to use. Input arguments, for instance, are assumed to all be the
correct length and type, and missing values are not allowed: the calling
routine is responsible for these things.
Usage
concordancefit(y, x, strata, weights, ymin = NULL, ymax = NULL,
timewt = c("n", "S", "S/G", "n/G2", "I"), cluster, influence =0,
ranks = FALSE, reverse = FALSE, timefix = TRUE, keepstrata=10,
std.err = TRUE)
Arguments
y |
the response. It can be numeric, factor, or a Surv object |
x |
the predictor, a numeric vector |
strata |
optional numeric vector that stratifies the data |
weights |
options vector of case weights |
ymin, ymax |
restrict the comparison to response values in this range |
timewt |
the time weighting to be used |
cluster, influence, ranks, reverse, timefix |
see the help for the
|
keepstrata |
either TRUE, FALSE, or an integer value.
Computations are always done within stratum, then added. If the
total number of strata greater than |
std.err |
compute the standard error; not doing so saves some compute time. |
Details
This function is provided for those who want a “direct” call to the concordance calculations, without using the formula interface. A primary use has been other packages. The routine does minimal checking of its input arguments, under the assumption that this has already been taken care of by the calling routine.
Value
a list containing the results
Author(s)
Terry Therneau