R: Plot a SiZer map Plot a 'SiZer' object that was created using...

plot.SiZer {SiZer} | R Documentation

## Plot a SiZer map Plot a `SiZer` object that was created using `SiZer()`

### Description

Plot a SiZer map Plot a `SiZer` object that was created using `SiZer()`

### Usage

    ## S3 method for class 'SiZer'
    plot(x, ylab = expression(log[10](h)), colorlist = c("red",
      "purple", "blue", "grey"), ...)

### Arguments

`x` | An object created using `SiZer()`
`ylab` | What the y-axis should be labled.
`colorlist` | What colors should be used. This is a vector that corresponds to 'decreasing', 'possibley zero', 'increasing', and 'insufficient data'.
`...` | Any other parameters to be passed to the function `image`.

### Details

The white lines in the SiZer map give a graphical representation of the bandwidth. The horizontal distance between the lines is 2h.

### Author(s)

Derek Sonderegger

### References

Chaudhuri, P., and J. S. Marron. 1999. SiZer for exploration of structures in curves. Journal of the American Statistical Association 94:807-823.

Hannig, J., and J. S. Marron. 2006. Advanced distribution theory for SiZer. Journal of the American Statistical Association 101:484-499.

Sonderegger, D.L., Wang, H., Clements, W.H., and Noon, B.R. 2009. Using SiZer to detect thresholds in ecological data. Frontiers in Ecology and the Environment 7:190-195.

### See Also

`plot.SiZer`, `locally.weighted.polynomial`

### Examples

    data('Arkansas')
    x <- Arkansas$year
    y <- Arkansas$sqrt.mayflies

    plot(x,y)

    # Calculate the SiZer map for the first derivative
    SiZer.1 <- SiZer(x, y, h=c(.5,10), degree=1, derv=1, grid.length=21)
    plot(SiZer.1)

    # Calculate the SiZer map for the second derivative
    SiZer.2 <- SiZer(x, y, h=c(.5,10), degree=2, derv=2, grid.length=21);
    plot(SiZer.2)

    # By setting the grid.length larger, we get a more detailed SiZer
    # map but it takes longer to compute.
    #
    # SiZer.3 <- SiZer(x, y, h=c(.5,10), grid.length=100, degree=1, derv=1)
    # plot(SiZer.3)

[Package SiZer version 0.1-5 Index]