maLoessLines {marray} | R Documentation |

## Add smoothed fits to a plot

### Description

This function may be used to compute and plot loess or lowess fits for an existing plot. The plot can be produced by `plot`

, `maPlot`

, or `maPlot.func`

.

### Usage

maLoessLines(subset=TRUE, weights=NULL, loess.args=list(span = 0.4,
degree=1, family="symmetric", control=loess.control(trace.hat =
"approximate", iterations=5, surface="direct")), col=2, lty=1, lwd=2.5, ...)
maLowessLines(subset = TRUE, f = 0.3, col = 2, lty = 1, lwd = 2.5, ...)

### Arguments

`subset` |
A "logical" or "numeric" vector indicating the subset of points used to compute the fits. |

`weights` |
Optional "numeric" vector of weights – for `maLoessLines` only. |

`loess.args` |
List of optional arguments for the `loess` functions – for `maLoessLines` only. |

`f` |
The smoother span for the `lowess` function – for `maLowessLines` only. |

`col` |
The fitted line colors. |

`lty` |
The fitted line types. |

`lwd` |
The fitted line widths. |

`...` |
Optional graphical parameters, see `par` . |

### Value

A function with bindings for `subset`

, `weights`

, `loess.args`

, `col`

, `lty`

, `lwd`

, and `...`

. This latter function takes as arguments `x`

and `y`

, the abscissa and ordinates of points on the plot, and `z`

a vector of discrete values used to stratify the points. Loess (or lowess) fits are performed separately within values of `z`

.

### Author(s)

Sandrine Dudoit, http://www.stat.berkeley.edu/~sandrine.

### References

S. Dudoit and Y. H. Yang. (2002). Bioconductor R packages for exploratory analysis and normalization of cDNA microarray data. In G. Parmigiani, E. S. Garrett, R. A. Irizarry and S. L. Zeger, editors, *The Analysis of Gene Expression Data: Methods and Software*, Springer, New York.

### See Also

`loess`

, `lowess`

, `maPlot`

, `maPlot.func`

.

### Examples

# See examples for maPlot.

[Package

*marray* version 1.8.0

Index]