sumi: Summing MS Intensity Values

In rformassspectrometry/MsCoreUtils: Core Utils for Mass Spectrometry Data

Summing MS Intensity Values

Description

sumi sums mass spectrometry intensity values, e.g. from a spectrum or chromatogram. In contrast to the base R sum() function this function returns NA_real_ if all intensity values are NA or if length(x) is 0.

Usage

sumi(x)

Arguments

x	numeric with intensity values to be summed up. Will be coerced to numeric using as.double.

Value

numeric(1) representing the sum of values in x. Always returns a numeric (double) even if x is an integer.

Author(s)

Johannes Rainer

See Also

maxi()

Examples

x <- c(3.2, 34.4, 1.3, NA)
sumi(x)

## Compared to base R sum:
sum(x)
sum(x, na.rm = TRUE)

sum(numeric(), na.rm = TRUE)
sumi(numeric())

sum(c(NA, NA), na.rm = TRUE)
sumi(c(NA, NA))

rformassspectrometry/MsCoreUtils documentation built on Oct. 24, 2024, 1:52 p.m.