Description Arguments Examples
This class defines how peaks in an MS spectrum are annotated. In its current
preliminary implementation, if defines lists of peaks and and annotations,
both of which must have the same length. Each element of
annotated by the corresponding element of
annotations. Elements of
can contain a single numeric corresponding to the m/z of a peak in a
centroided spectrum, of a vector of m/z values when a set of peaks (for
instance in case of profile mode data) are annotated by an
Currently, there are no constrains on either
elements. The latters can be either descriptive characters, as in the
examples below, or could be encoded as dataframes. This is likely to change
in the future.
Objects are created with the
Objects of class
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pa1 <- PeakAnnotation(peaks = list(123.3, c(234.1, 234.12, 234.15)), annotations = list("b2", "y3")) pa1 pa2 <- PeakAnnotation(peaks = list(c(345.3, 345.32, 345.35, 345.39, 345.4), 657.01, 1231.182), annotations = list("a5", "z3", "y7")) pa2 pas <- PeakAnnotations(pa1, pa2) pas dfr <- DataFrame(x = 1:2, y = LETTERS[1:2], annot = pas) dfr
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