Contingency Table Question

[acedonfoster]

Novice user. I have 3 types of responses based on the device and treatment. If only two responses from the treatment with the particular device was recorded of the three, how do I get R to exclude the response?

For instance:
Responses are NF, AA, AD
only NF and AD were a response, AA was not. Out of 20 replicates, 2 of AA did not occur.

mosaicplot(Flight_Activation)

chisq.test(Flight_Activation,correct=FALSE)
Error in chisq.test(Flight_Activation, correct = FALSE) : invalid 'x'
chisq.test(flight$Response)
Error in if (any(x < 0) || anyNA(x)) stop("all entries of 'x' must be nonnegative and finite") :
missing value where TRUE/FALSE needed
In addition: Warning message:
In Ops.factor(x, 0) : ‘<’ not meaningful for factors

[andresrcs]

Hi!

To help us help you, could you please prepare a reproducible example (reprex) illustrating your issue? Please have a look at this guide, to see how to create one:

FAQ: How to do a minimal reproducible example ( reprex ) for beginners

A minimal reproducible example consists of the following items: A minimal dataset, necessary to reproduce the issue The minimal runnable code necessary to reproduce the issue, which can be run on the given dataset, and including the necessary information on the used packages. Let's quickly go over each one of these with examples: Minimal Dataset (Sample Data) You need to provide a data frame that is small enough to be (reasonably) pasted on a post, but big enough to reproduce your issue. Let's say, as an example, that you are working with the iris data frame head(iris) #> Sepal.Length Sepal.Width Petal.Length Petal.Width Species #> 1 5.1 3.5 1.4 0.…

[acedonfoster]

(df<-data.frame(
  Batch.Label = c(1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L),
  Device = as.factor(c("SVC", "SVC", "SVC", "GO", "GO", "GO", "40WI",
                       "40WI", "40WI", "15WFL", "15WFL",
                       "15WFL")),
  Screen = as.factor(c("c", "D", "E", "c", "D", "E", "c", "D", "E", "c",
                       "D", "E")),
  Response = as.factor(c("NF", "AD", "AD", "AD", "AA", "AA", "AD", "AA",
                         "AA", "AD", "AA", "AA"))
)
mytable<- table(df$Device,df$Screen,df$Response)
mytable
chisq.test(df,correct=FALSE))