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Hw02 submission (this time with all files from repo - whoops) #29

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ggplot() +
geom_point(mapping = aes(x = displ, y = hwy, color = class), alpha = 1, size = 2) +
# alpha refers to the opacity of a geom
theme(legend.position = "top")

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You can also use legend.position = c(x, y) to overlay the legend with the plot, where with x and y you specify the position on x and y axes. It's kinda tricky, because x/y has to be between 0 and 1, so you sort of have to calculate the fraction of your axis range, i.e. if your y range is 0-8 and you want it to be at y = 4, then you would specify y = 0.5, since halfway to the top. Maybe there's a more straightforward way, but I haven't found it yet. Also legend.position = "none" will remove the legend!

geom_bar(aes(fill = clarity), position = position_dodge()) +
theme(legend.position = "right") +
labs(title="My Diamond Collection",
subtitle="Boxplot representing the number of diamonds in my diamond collection by type of cut quality and clarity of diamond",

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Cool! I didn't know you can rename x and y axes just with x and y parameters within labs(). Also a hint - you can introduce a line break by adding \n in the character string. I can see that it doesn't happen automatically. And I did move the annotation by using annotate() and specifying x and y positions ("Premium" and 4500 in this case). Hope this helps!

data("iris")
ggplot(iris, aes(x = Sepal.Length, y = Petal.Length, color = Species)) +
geom_point(data = subset(iris, Species %in% c("setosa", "virginica", "versicolor"))) +
facet_wrap(~Species) +

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Congrats on finding a way to group the data into panels. Honestly I spent most of my time on this graph. In order to re-order the panels I found a way to generate a new subset with re-ordered data (iris$Species2 <- factor(iris$Species, levels = c("versicolor", "setosa", "virginica")). and then passed this subset to facet_wrap(). And to change scales range I used scales = free_y. Anyway, GJ! That was a tricky one.

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