# plot.hare: Hare: hazard regression In polspline: Polynomial Spline Routines

 plot.hare R Documentation

## Hare: hazard regression

### Description

Plots a density, distribution function, hazard function or survival function for a `hare` object.

### Usage

``````## S3 method for class 'hare'
plot(x, cov, n = 100, which = 0, what = "d", time, add = FALSE, xlim,
xlab, ylab, type, ...) ``````

### Arguments

 `x` `hare` object, typically the result of `hare`. `cov` a vector of length `fit\\$ncov`, indicating for which combination of covariates the plot should be made. Can be omitted only if `fit\\$ncov` is 0. `n` the number of equally spaced points at which to plot the function. `which` for which coordinate should the plot be made. 0: time; positive value i: covariate i. Note that if which is the positive value i, then the element corresponding to this covariate must be given in `cov` even though its actual value is irrelevant. `what` what should be plotted: `"d"` (density), `"p"` (distribution function), `"s"` (survival function) or `"h"` (hazard function). `time` if which is not equal to 0, the value of time for which the plot should be made. `add` should the plot be added to an existing plot? `xlim` plotting limits; default is from the maximum of 0 and 10% before the 1st percentile to the minimmum of 10% further than the 99th percentile and the largest observation. `xlab,ylab` labels for the axes. Per default no labels are printed. `type` plotting type. The default is lines. `...` all other plotting options are passed on.

### Details

This function produces a plot of a `hare` fit at `n` equally spaced points roughly covering the support of the density. (Use `xlim=c(from,to)` to change the range of these points.)

### Author(s)

Charles Kooperberg clk@fredhutch.org.

### References

Charles Kooperberg, Charles J. Stone and Young K. Truong (1995). Hazard regression. Journal of the American Statistical Association, 90, 78-94.

Charles J. Stone, Mark Hansen, Charles Kooperberg, and Young K. Truong. The use of polynomial splines and their tensor products in extended linear modeling (with discussion) (1997). Annals of Statistics, 25, 1371–1470.

`hare`, `summary.hare`, `dhare`, `hhare`, `phare`, `qhare`, `rhare`.

### Examples

``````fit <- hare(testhare[,1], testhare[,2], testhare[,3:8])
# hazard curve for covariates like case 1
plot(fit, testhare[1,3:8], what = "h")
# survival function as a function of covariate 2, for covariates as case 1 at t=3
plot(fit, testhare[1,3:8], which = 2, what = "s",  time = 3)
``````

polspline documentation built on Oct. 27, 2023, 1:07 a.m.