Add fitted survival (or hazard or cumulative hazard) curves from a
`flexsurvreg`

model fit to an existing plot.

## Usage

```
# S3 method for flexsurvreg
lines(
x,
newdata = NULL,
X = NULL,
type = "survival",
t = NULL,
est = TRUE,
ci = NULL,
B = 1000,
cl = 0.95,
col = "red",
lty = 1,
lwd = 2,
col.ci = NULL,
lty.ci = 2,
lwd.ci = 1,
...
)
```

## Arguments

- x
Output from

`flexsurvreg`

, representing a fitted survival model object.- newdata
Covariate values to produce fitted curves for, as a data frame, as described in

`plot.flexsurvreg`

.- X
Covariate values to produce fitted curves for, as a matrix, as described in

`plot.flexsurvreg`

.- type
`"survival"`

for survival,`"cumhaz"`

for cumulative hazard, or`"hazard"`

for hazard, as in`plot.flexsurvreg`

.- t
Vector of times to plot fitted values for.

- est
Plot fitted curves (

`TRUE`

or`FALSE`

.)- ci
Plot confidence intervals for fitted curves.

- B
Number of simulations controlling accuracy of confidence intervals, as used in

`summary`

.- cl
Width of confidence intervals, by default 0.95 for 95% intervals.

- col
Colour of the fitted curve(s).

- lty
Line type of the fitted curve(s).

- lwd
Line width of the fitted curve(s).

- col.ci
Colour of the confidence limits, defaulting to the same as for the fitted curve.

- lty.ci
Line type of the confidence limits.

- lwd.ci
Line width of the confidence limits, defaulting to the same as for the fitted curve.

- ...
Other arguments to be passed to the generic

`plot`

and`lines`

functions.

## Details

Equivalent to `plot.flexsurvreg(...,add=TRUE)`

.

## Author

C. H. Jackson chris.jackson@mrc-bsu.cam.ac.uk