CalculateLimits: CalculateLimits

In Rspc: Nelson Rules for Control Charts

Description

Evaluates whether to use custom limits or calculate them from the data.

Usage

CalculateLimits(x, lcl = NA, cl = NA, ucl = NA, type = "i",
  controlLimitDistance = 3)

Arguments

x	Numerical vector
lcl	Lower control limit, single value or NA
cl	Central line, single value or NA
ucl	Upper control limit, single value or NA
type	Type of control chart, either "i" for i-chart (default) or "c" for c-chart
controlLimitDistance	Multiple of st.dev to be used to calculate limits, possible values: 1, 2, 3 (default); this parameter affect the interpretation of lcl and ucl parameters

Details

If at least two limits were provided, the missing ones are calculated from the them. If one or zero limits were provided the rest is computed from data.

Value

Named list with limits

Examples

CalculateLimits(x = rnorm(10), lcl = NA, cl = 100, ucl = NA, type = 'i')

Example output

$ucl
[1] 101.8292

$cl
[1] 100

$lcl
[1] 98.17079

Rspc documentation built on May 2, 2019, 9:19 a.m.