# plot.apc: Plot the estimates from a fitted Age-Period-Cohort model In Epi: A Package for Statistical Analysis in Epidemiology

## Description

This function plots the estimates created by `apc.fit` in a single graph. It just calls `apc.frame` after computing some sensible values of the parameters, and subsequently plots the estimates using `apc.lines`.

## Usage

 ```1 2 3``` ```## S3 method for class 'apc' plot( x, r.txt="Rate", ...) apc.plot( x, r.txt="Rate", ...) ```

## Arguments

 `x` An object of class `apc`. `r.txt` The text to put on the vertical rate axis. `...` Additional arguments passed on to `apc.lines`.

## Details

`plot.apc` is just a wrapper for `apc.plot`.

## Value

A numerical vector of length two, with names `c("cp.offset","RR.fac")`. The first is the offset for the cohort period-axis, the second the multiplication factor for the rate-ratio scale. Therefore, if you want to plot at `(x,y)` in the right panel, use `(x-res["cp.offset"],y/res["RR.fac"])` `=(x-res[1],y/res[2])`. This vector should be supplied for the parameter `frame.par` to `apc.lines` if more sets of estimates is plotted in the same graph, however see `cp.points`.

## Author(s)

Bendix Carstensen, Steno Diabetes Center, http://BendixCarstensen.com

`apc.lines`, `lines.apc`, `apc.frame`, `apc.fit`

## Examples

 ```1 2 3 4 5 6 7``` ```data( lungDK ) attach( lungDK ) apc1 <- apc.fit( A=Ax, P=Px, D=D, Y=Y/10^5 ) fp <- apc.plot( apc1 ) apc.lines( apc1, frame.par=fp, drift=1.01, col="red" ) for( i in 1:11 ) apc.lines( apc1, frame.par=fp, drift=1+(i-6)/100, col=rainbow(12)[i] ) ```

### Example output

```Attaching package: 'Epi'

The following object is masked from 'package:base':

merge.data.frame

[1] "ML of APC-model Poisson with log(Y) offset : ( ACP ):\n"

Analysis of deviance for Age-Period-Cohort model

Resid. Df Resid. Dev Df Deviance  Pr(>Chi)
Age                     215    15568.2
Age-drift               214     6965.1  1   8603.2 < 2.2e-16 ***
Age-Cohort              211     1152.5  3   5812.5 < 2.2e-16 ***
Age-Period-Cohort       208      549.4  3    603.2 < 2.2e-16 ***
Age-Period              211     3211.4 -3  -2662.1 < 2.2e-16 ***
Age-drift               214     6965.1 -3  -3753.6 < 2.2e-16 ***
---
Signif. codes:  0 '***' 0.001 '**' 0.01 '*' 0.05 '.' 0.1 ' ' 1
No reference period given:
Reference period for age-effects is chosen as
the median date of birth for persons  with event:  1911.333 .
```

Epi documentation built on March 18, 2018, 1:41 p.m.