CODEWITHSUNDEEP
rggplot2
youngtred
youngtred

Reputation: 155

Side by side Scatter plot

I am trying to build a plot that compares two groups in four different categories, side by side, all with the same y scale (example data below). I have tried to use the group_by function to group data prior to plotting however I only get data for both groups combined in all categories (shown in image). I do not want to facet the plots, although if there is no other option, this may have to work. I feel this should be a simple answer, but if anyone could help with where I am going wrong, I would be very appreciative.

Example data:

    Group Category yvar        
    1     cat1     76.41383        
    1     cat2     51.24885
    1     cat3     68.20408
    1     cat4     79.14243
    2     cat1     72.35527
    2     cat2     64.61710
    2     cat3     75.75096
    2     cat4     73.71880

Script used:

my_data %>%
 group_by(Group) %>%
 ggplot(aes(x = Category, y = yvar)) +
 geom_jitter(width = 0.1) +
 geom_boxplot(alpha = 0)

Plot example enter image description here

Upvotes: 0

Views: 611

Answers (2)

Ian Campbell
Ian Campbell

Reputation: 24790

Here's an approach with stat_boxplot and geom_dotplot:

ggplot(data, aes(x = as.factor(Category), y = yvar, fill = as.factor(Group))) +
   stat_boxplot(outlier.shape = NA, alpha = 0) +
   geom_dotplot(binaxis = "y", 
                stackdir = "center",
                position = position_dodge(0.75),
                dotsize = 0.7, binwidth = 0.5) + 
   scale_fill_manual(values = c("firebrick3","cornflowerblue")) +
   labs(fill = "Group", y = "Y Variable", x = "Category")

enter image description here

Data

set.seed(3)
data <- data.frame(Group = rep(1:2,each = 80),
                    Category = rep(LETTERS[1:4], each = 20),
                    yvar = do.call(c,lapply(1:8,function(x){rnorm(20,x,2)})))

Upvotes: 1

Auggie Heschmeyer
Auggie Heschmeyer

Reputation: 143

What if you added fill or color to aes() and assigned the Group variable to one of them? That should give you the same plot as the one above, but now with one set of four box plots in one color representing Group 1 and another four in a different color for Group 2.

Upvotes: 0

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