ggplot discrepancy between faceted and individual plots

Question

I think there is a discrepancy between the faceted plots and the individual plot.

Pay attention to mouse number 9214 in these plots:

# Make the faceted graph
fig1 = ggplot(raw, aes(raw$Bregma.)) + geom_density() + ggtitle("Fig. 1. Bregma Representation, by mouse (red = post-ex, green = post-rev)") + 
  geom_density(data = raw_excluded, aes(raw_excluded$Bregma.), color = "red") +
  geom_density(data = raw_revised, aes(raw_revised$Bregma.), color = "green")+ facet_wrap(~Mouse.ID.)

fig1

Faceted plot

When I run the individual ggplot for that data, it looks like this, which is NOT what it looks like in the faceted image:

temp_indiv_plot = function(x) {
  temp_mouse = x
  temp_mouse_original = filter(raw, raw$Mouse.ID == temp_mouse)
  temp_mouse_revised = filter(raw_revised, raw_revised$Mouse.ID. == temp_mouse)

  ggplot(temp_mouse_original, aes(x = temp_mouse_original$Bregma.)) + geom_density() + 
    geom_density(data = temp_mouse_revised, aes(temp_mouse_revised$Bregma.), color = "green") + 
    ggtitle(temp_mouse)
}

temp_indiv_plot("8350")
temp_indiv_plot("9214")

Individual plot for mouse 9214

But I plotted another mouse (8350) to see if it was consistent, but it looks identical to the faceted graph (can't add more than 3 links until I have enough reputation, you'll have to take my word for it now).

So why is mouse 9214 different?

It's going to be nearly impossible for anyone to help you unless they can run the code and produce the graphs themselves. As a side note, you should *never* be selecting variables using `$` inside of `aes()`. The whole purpose of having a `data` argument is that then `aes(x = variable)` looks for `variables` inside of `data`. When you do things like `aes(raw_excluded$Bregma.)` unexpected things _may_ happen. — joran, Sep 06 '17 at 22:21
@joran 's comment applies to `dplyr` functions such as `filter`. These should read `filter(raw, Mouse.ID == ... )` — lebelinoz, Sep 06 '17 at 22:31
It's very likely due to using dollar signs in `aes`, see [here](https://stackoverflow.com/a/32543753/2461552) — aosmith, Sep 06 '17 at 22:43

ggplot discrepancy between faceted and individual plots

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