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@ -708,19 +708,21 @@ ggplot(data = mpg) +
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##### Exercises
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##### Exercises
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1. What graph will this code make?
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1. What graph will this code make?
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```{r eval = FALSE}
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ggplot(data = mpg) +
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geom_point(mapping = aes(x = displ, y = hwy)) +
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facet_grid(drv ~ .)
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```
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1. What graph will this code make?
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```{r eval = FALSE}
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```{r eval = FALSE}
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ggplot(data = mpg) +
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ggplot(data = mpg) +
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geom_point(mapping = aes(x = displ, y = hwy)) +
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geom_point(mapping = aes(x = displ, y = hwy)) +
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facet_grid(drv ~ .)
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facet_grid(. ~ cyl)
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```
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```
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1. What graph will this code make?
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```{r eval = FALSE}
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ggplot(data = mpg) +
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geom_point(mapping = aes(x = displ, y = hwy)) +
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facet_grid(. ~ cyl)
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```
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### The layered grammar of graphics
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### The layered grammar of graphics
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