I need help with the mult.chart function from package MSQC in R. I searched and tried to add a baseline to the chart, but I was not able to do it.
Here is what I am trying to do:
library(MSQC)
variable1 <- 1:100
variable2 <- 1:100
data_MULTI <- data.frame(variable1 , variable2 )
baseline <- data_MULTI[1:21,]
mult.chart(type = "mewma", data_MULTI, baseline=baseline, lambda=0.4, alpha=0.05, method = "hm")
I also tried:
library(MSQC)
variable1 <- 1:100
variable2 <- 1:100
data_MULTI <- data.frame(variable1 , variable2 )
baseline <- data_MULTI[1:21,]
mult.chart(type = "mewma", data=baseline, newdata=data_MULTI[22:100], lambda=0.4, alpha=0.05, method = "hm")
None of these worked.
Do you know how I can add a baseline to these multivariate models?
I appreciate your help
The mult.chart function (MSQC package) does not have a "baseline" argument. I think that your incorrect result comes not from errors in the code, but from an incorrect approach to MSQC. Your baseline is Phase I, as in the official example:
#Phase I
data(carbon1)
mult.chart(type = "t2", carbon)
#Phase II
Xmv <- mult.chart(carbon1, type = "t2") $Xmv
S <- mult.chart(carbon1, type = "t2") $covariance
colm <- nrow(carbon1)
data(carbon2)
mult.chart(carbon2, type = "t2", Xmv = Xmv, S = S, colm = colm)