Plots curves with various levels of loess smoothing to help determine what
loess parameters are best for the data.

plotsmooth(rspecdata, minsmooth = 0.05, maxsmooth = 0.2, curves = 5,
specnum = 0, 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

## Examples

# NOT RUN {
data(sicalis)
plotsmooth(sicalis,0.05,0.1,7,6)
# }