Last data update: 2014.03.03

R: Calculate 40Ar/39Ar ages
 getages R Documentation

## Calculate 40Ar/39Ar ages

### Description

Calculate 40Ar/39Ar ages from a vector of 40Ar/39Ar-ratios and J-factors

### Usage

```getages(RJ)
```

### Arguments

 `RJ` an object of class `Redux` containing the amalgamated \$^40\$Ar\$^*\$/\$^39\$Ar\$_K\$-ratios and J-factors with their covariance matrix

### Value

an object of class `results` containing the ages and their covariance matrix

### Examples

```data(Melbourne)
R <- get4039(Melbourne\$X,Melbourne\$irr)
J <- getJfactors(R)
ages <- getages(J)
plotcorr(ages)
```

### Results

```
R version 3.3.1 (2016-06-21) -- "Bug in Your Hair"
Copyright (C) 2016 The R Foundation for Statistical Computing
Platform: x86_64-pc-linux-gnu (64-bit)

R is free software and comes with ABSOLUTELY NO WARRANTY.
You are welcome to redistribute it under certain conditions.
Type 'license()' or 'licence()' for distribution details.

R is a collaborative project with many contributors.
'citation()' on how to cite R or R packages in publications.

Type 'demo()' for some demos, 'help()' for on-line help, or
'help.start()' for an HTML browser interface to help.
Type 'q()' to quit R.

> library(ArArRedux)
> png(filename="/home/ddbj/snapshot/RGM3/R_CC/result/ArArRedux/getages.Rd_%03d_medium.png", width=480, height=480)
> ### Name: getages
> ### Title: Calculate 40Ar/39Ar ages
> ### Aliases: getages
>
> ### ** Examples
>
> data(Melbourne)
> R <- get4039(Melbourne\$X,Melbourne\$irr)
> J <- getJfactors(R)
> ages <- getages(J)
> plotcorr(ages)
Warning message:
In stats::cov2cor(X\$covmat) :
diag(.) had 0 or NA entries; non-finite result is doubtful
>
>
>
>
>
> dev.off()
null device
1
>

```