minDiff {wrMisc}

Minimum distance/difference between values

Description

This function aims to find the min distance (ie closest point) to any other x (numeric value), ie intra 'x' and returns matrix with 'index','value','dif','ppm','ncur','nbest','best'. At equal distance to lower & upper neighbour point, the upper (following) point is chosen (as single best). In case of multiple ex-aequo distance returns 1st of multiple, may be different at various repeats.

Usage

minDiff(
  x,
  digSig = 3,
  ppm = TRUE,
  initOrder = TRUE,
  silent = FALSE,
  debug = FALSE,
  callFrom = NULL
)

Arguments

x

(numeric) vector to search minimum difference

digSig

number of significant digits, used for ratio or ppm column

ppm

(logical) display distance as ppm (1e6*diff/refValue, ie normalized difference eg as used in mass spectrometry), otherwise the ratio is given as : value(from 'x') / closestValue (from 'x')

initOrder

(logical) return matrix so that 'x' matches exactely 2nd col of output

silent

(logical) suppress messages

debug

(logical) additional messages for debugging

callFrom

(character) allow easier tracking of messages produced

Value

This function returns a matrix

See Also

diff

Examples

set.seed(2017); aa <- 100*c(0.1 +round(runif(20),2),0.53,0.53)
minDiff(aa); 
minDiff(aa,initO=TRUE,ppm=FALSE); .minDif(unique(aa))