Difficulty plotting based on levels

[sophschwartz]

Error in levels<-(*tmp*, value = as.character(levels)) :
factor level [4] is duplicated

Dataframe:
Z-Score_Alpha_Right_Temporal_GroupbyMeasurement.xlsx

Code:
Z_Score_Alpha_Right_Temporal <- read_excel("(https://github.com/ACCLAB/dabestr/files/5042212/Z-Score_Alpha_Right_Temporal_GroupbyMeasurement.xlsx")
multi.two.group.unpaired <-
Z_Score_Alpha_Right_Temporal %>%
dabest(Group, Measurement,
idx = list(c("ASDV", "TD"),
c("ASDMLV", "TD"),
c("ASDMLV", "ASDV")),
paired = FALSE)
multi.two.group.unpaired.meandiff <- mean_diff(multi.two.group.unpaired)
plot(multi.two.group.unpaired.meandiff, color.column = Group)

The group appears to have 3 levels based on:
multi.two.group.unpaired.meandiff[[1]]$Group <- factor(multi.two.group.unpaired.meandiff[[1]]$Group, levels = unique(multi.two.group.unpaired.meandiff[[1]]$Group), ordered=FALSE)

[josesho]

Hi @sophschwartz ,

The error arises because you have repeated groups in your idx, as seen in your example:

idx = list(c("ASDV", "TD"),
              c("ASDMLV", "TD"),
              c("ASDMLV", "ASDV"))

From the earliest stages of designing dabestr, we decided not to allow plotting of the same group twice—both an aesthetic decision and a statistical one: we don't want viewers (and the plotters themselves) to unintentionally perceive the two instances of ASDMLV, for instance in this case.

The UI/UX, however, can be improved: when loading the data into dabestr, and when calling the mean_diff function. (In fact, the effect size functions do allow computation of the effect sizes!!)

On a broader and related topic: there have been several requests (here, here, and here) to perform ANOVA in DABEST: comparing all groups to all other groups. What we consider best practice is to use delta-delta plots. These are still being developed, unfortunately.

You can use estimationstats.com to produce the plot you desire as well, but the second appearance of a repeated group will be colored differently (and given an additional prefix): you can fix this in any vector graphics software.

Hope this helps!
Joses