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 1.14.0 Index]