plot.smooth.line {sma} | R Documentation |

## Adding Lowess Lines to Current Plot

### Description

This function adds a `lowess`

line to the current
plot. The type of line can be specified as well as other
parameters.

### Usage

plot.smooth.line(x, M, f=0.1, ...)

### Arguments

`x` |
a vector giving the x-coordinates of the points in the scatter
plot. In the microarray context, this could be a vector of
average log intensities. ie A |

`M` |
a vector giving the y-coordinates of the points in the scatter
plot. In the microarray context, this could be a vector of
log intensity ratios. |

`f` |
the smoother span. This gives the proportion of points in the
plot which influence the smoothness at each value. Larger
values give greater smoothness. |

`...` |
graphical parameters may also be supplied as arguments
to the function (see `par` ). |

### Value

lines are added to the current plot.

### Note

An M vs A plot must be constructed **prior** to the execution of this function.

### References

Chambers, J. M., Cleveland, W. S., Kleiner, B. and Tukey,
P. A. (1983). Graphical Methods for Data Analysis. Wadsworth, Belmont,
California.

### See Also

`plot.mva`

, `stat.ma`

,
`lines`

, `lowess`

, `smooth`

.

### Examples

data(MouseArray)
## mouse.setup <- init.grid()
## mouse.data <- init.data()
plot.mva(mouse.data, mouse.setup)
plot.smooth.line(mouse.lratio$A, mouse.lratio$M)

[Package

*sma* version 0.5.15

Index]