scales

# Scales

## color

Take your scatterplot that you just made and add a scale using `scale_color_brewer`. Take a look at the help docs and choose a palette other than the default (hint: look at the `palette` argument). 

```{r}
ggplot(data = nhanes,
       mapping = aes(x = weight,
                     y = height,
                     color = phys_active)) +
  geom_point() +
  scale_color_brewer(palette = "Dark2")
```

Do nearly the same thing to change the color of the last bar chart you made (the one about sleep and gender). 

```{r}
ggplot(data = sleep_by_gender, 
       mapping = aes(x = gender, 
                     y = avg_sleep,
                     fill = gender)) +
  geom_col() +
  scale_fill_brewer(palette = "Dark2") 
```

## x and y axes

Copy the graph you just made and change the y axis so it goes from 0 to 8.

```{r}
ggplot(data = sleep_by_gender, 
       mapping = aes(x = gender, 
                     y = avg_sleep,
                     fill = gender)) +
  geom_col() +
  scale_fill_brewer(palette = "Dark2") +
  scale_y_continuous(limits = c(0, 8))
```

Copy the last code chunk. Then adjust the breaks on the y axis so that it shows 0 to 8 by 1 (i.e. 0, 1, 2, etc).

```{r}
ggplot(data = sleep_by_gender, 
       mapping = aes(x = gender, 
                     y = avg_sleep,
                     fill = gender)) +
  geom_col() +
  scale_fill_brewer(palette = "Dark2") +
  scale_y_continuous(limits = c(0, 8),
                     breaks = c(0, 1, 2, 3, 4, 5, 6, 7, 8))
```