rms Specifications for Models
Prints the design specifications, e.g., number of parameters for each factor, levels of categorical factors, knot locations in splines, pre-transformations, etc.
specs(fit, ...) ## S3 method for class 'rms' specs(fit, long=FALSE, ...) ## S3 method for class 'specs.rms' print(x, ...)
fit |
a fit object created with the |
x |
an object returned by |
long |
if |
... |
ignored |
a list containing information about the fit and the predictors as elements
Frank Harrell
Department of Biostatistics, Vanderbilt University
fh@fharrell.com
set.seed(1) blood.pressure <- rnorm(200, 120, 15) dd <- datadist(blood.pressure) options(datadist='dd') L <- .03*(blood.pressure-120) sick <- ifelse(runif(200) <= plogis(L), 1, 0) f <- lrm(sick ~ rcs(blood.pressure,5)) specs(f) # find out where 5 knots are placed g <- Glm(sick ~ rcs(blood.pressure,5), family=binomial) specs(g,long=TRUE) options(datadist=NULL)
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