These hyperSpec functions are deprecated and not maintained any more. You should not use these. Currently they are present due to back-compatibility reasons and will be removed in the next release of the package. Please, use the suggested alternative functions instead.

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Character vectors used for names (e.g. colnames for matrices or data.frames) are often treated by base::make.names() or similar functions that produce suitable names (e.g. by pre-pending "X" to numbers). Such names cannot be directly converted to numeric.

guess.wavlength() tries to extract numbers from X which may be surrounded by such "protecting" characters.

guess.wavelength(X)

## Arguments

X

character with numbers hidden inside

## Value

numeric

tmp <- data.frame(flu[[, , 400 ~ 410]])