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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 rms
specs(fit, long=FALSE, …)# S3 method for specs.rms
print(x, …)
a fit object created with the rms library in effect
an object returned by specs
if TRUE, causes the plotting and estimation limits to be printed for
each factor
ignored
a list containing information about the fit and the predictors as elements
# NOT RUN {
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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