spc_i: SPC I

In tomjemmett/NHSRspc: NHS-R SPC

Description

Calculates limits for an SPC-I chart

Usage

spc_i(
  x = seq_along(y),
  y = numeric(),
  centre = NULL,
  limits = 3,
  exclude = rep(FALSE, length(y)),
  freeze = NULL
)

Arguments

x	numeric vector to order y by, defaults to an incrementing sequence (assuming the provided order of y is correct)
y	numeric vector that we want to calculate control limits for
centre	the centre of y, defaults to the mean of y
limits	the multiplier used to calculate limits, defaults to +/- 3
exclude	a logical vector the same length of y, indicating points to exclude from control limit calculations
freeze	a number indicating after how many points to freeze control limit calculations after

Value

an spc_i object

Examples

set.seed(123)
y <- rnorm(10)
spc_i(y = y)

x <- sample(1:10)
spc_i(x, y)

spc_i(x, y, centre = 3)

spc_i(x, y, exclude = sample(c(TRUE, FALSE),
                             size = length(y),
                             prob = c(0.3, 0.7),
                             replace = TRUE))

tomjemmett/NHSRspc documentation built on Dec. 31, 2020, 8:44 a.m.