npcv: Non-parametric coefficient of variation
In MSnbase: Base Functions and Classes for Mass Spectrometry and Proteomics

Description Usage Arguments Details Value Author(s) Examples

Calculates a non-parametric version of the coefficient of variation where the standard deviation is replaced by the median absolute deviations (see mad for details) and divided by the absolute value of the mean.

1	npcv(x, na.rm = TRUE)

`x`	A `numeric`.
`na.rm`	A `logical` (default is `TRUE` indicating whether `NA` values should be stripped before the computation of the median absolute deviation and mean.

Note that the mad of a single value is 0 (as opposed to NA for the standard deviation, see example below).

A numeric.

Laurent Gatto

set.seed(1)
npcv(rnorm(10))
replicate(10, npcv(rnorm(10)))
npcv(1)
mad(1)
sd(1)

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This is MSnbase version 2.16.0 
  Visit https://lgatto.github.io/MSnbase/ to get started.


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[1] 5.852407
 [1]  3.112625  6.088948  4.928480  5.534139  6.124995  2.354319  2.996464
 [8]  6.049891 11.716089  3.265193
[1] 0
[1] 0
[1] NA