xLRCC {CC} | R Documentation |

## Computing x and LR-chart Parameters

### Description

This function computes control limits for the x and LR-charts, optionally revising them in the case that individual sample means and/or ranges plot out of the trial control limits.

### Usage

```
xLRCC(qc.obj, k=3, sigma, mu, revise=TRUE, newdata)
```

### Arguments

`qc.obj` |
an object of class CC |

`k` |
the control chart parameter governing the width of the control limits |

`sigma` |
(optional) an estimate of the in-control standard deviation |

`mu` |
(optional) an estimate of the in-control mean |

`revise` |
if TRUE, mu and sigma are estimated using only range values that plot inside the trial control limits |

`newdata` |
an n-vector consisting of data from new subgroups |

### Value

an object of class "CC"

### Author(s)

W.J. Braun

### References

Montgomery, D.C. (2000) Introduction to Statistical Quality Control, Wiley

### See Also

`plot.CC`

### Examples

```
rr.xLR <- xLRCC(rr$Avg)
plot(rr.xLR)
```

[Package

*CC*version 1.0 Index]