getIsotopeProportion,compoundQuantiles-method {CAMERA} | R Documentation

## The proportion of the intensities of two isotope peaks

### Description

Returns the proportion of the intensities of isotope1 versus isotope2 for a compound of the given mass for the given quantile level

### Usage

    ## S4 method for signature 'compoundQuantiles'
    getIsotopeProportion(object, isotope1, isotope2,
      mass, quantile)

### Arguments

`object` | A compoundQuantiles object
`isotope1` | The divident isotope ranging from 0 (the monoisotopic peak) to 5
`isotope2` | The divisor isotope ranging from 0 (the monoisotopic peak) to 5
`mass` | The mass of the compound specified in atomic units (=dalton)
`quantile` | The quantile level for the isotope proportion

### Value

The isotope proportion

### Author(s)

Hendrik Treutler

### Examples

    cpObj <- compoundQuantiles(compoundLibrary = "kegg")

    compoundMass <- 503
    isotope1 <- 0
    isotope2 <- 1
    quantileLow   <- 0.05
    quantileHigh  <- 0.95

    propLow  <- getIsotopeProportion(object = cpObj, isotope1 = isotope1, isotope2 = isotope2, mass = compoundMass, quantile = quantileLow)
    propHigh <- getIsotopeProportion(object = cpObj, isotope1 = isotope1, isotope2 = isotope2, mass = compoundMass, quantile = quantileHigh)
    print(paste("The ", (quantileHigh - quantileLow) * 100, "% confidence interval for the proportion of isotopes ", isotope1, " / ", isotope2, " in a compound with mass ", compoundMass, " is [", propLow, ", ", propHigh, "]", sep = ""))

[Package CAMERA version 1.50.0 Index]