Plots spectral curves with various levels of loess smoothing to help decide which
loess parameters are best for subsequently smoothing the data (e.g. via `procspec()`

).

plotsmooth(
rspecdata,
minsmooth = 0.05,
maxsmooth = 0.2,
curves = 5,
specnum = "ALL",
ask = TRUE
)

## Arguments

rspecdata |
(required) a data frame, possibly of class `rspec` , which
contains a column containing a wavelength range, named 'wl', and spectra
data in remaining columns. |

minsmooth |
the minimum f value of the loess function to visualize (defaults to `0.05` ). |

maxsmooth |
the maximum f value of the loess function to visualize (defaults to `0.20` ). |

curves |
the number of curves to display on the same plot (defaults to `5` ). |

specnum |
the number of spectral curves, from the data frame, to visualize (defaults to `ALL` ). |

ask |
logical. if `TRUE` , asks for user input before changing plot pages |

## Value

Series of plot with curves processed with varying level of loess smoothing

## See also

## Author

Pierre-Paul Bitton bittonp@uwindsor.ca

## Examples