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More tweaks from @behrman

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hadley 2016-07-31 11:40:08 -05:00
parent 9cf3badbf0
commit bd5a7a1c3a
1 changed files with 5 additions and 10 deletions
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visualize.Rmd
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@ -212,11 +212,6 @@ ggplot(shapes, aes(x, y)) +
1. What happens if you set an aesthetic to something other than a variable 1. What happens if you set an aesthetic to something other than a variable
name, like `displ < 5`? name, like `displ < 5`?
1. Vignettes are long-form guides that document things about
a package that affect many functions. ggplot2 has two vignettes.
How can you find them and what do they describe? (Hint: Google is
your friend.)
## Common problems ## Common problems
As you start to run R code, you're likely to run into problems. Don't worry --- it happens to everyone. I have been writing R code for years, and every day I still write code that doesn't work! As you start to run R code, you're likely to run into problems. Don't worry --- it happens to everyone. I have been writing R code for years, and every day I still write code that doesn't work!
@ -615,8 +610,7 @@ You can avoid this gridding by setting the position adjustment to "jitter". `po
```{r} ```{r}
ggplot(data = mpg) + ggplot(data = mpg) +
geom_point(mapping = aes(x = displ, y = hwy), position = "jitter") + geom_point(mapping = aes(x = displ, y = hwy), position = "jitter")
ggtitle('Position = "jitter"')
``` ```
Adding randomness seems like a strange way to improve your plot, but while it makes your graph less accurate at small scales, it makes your graph _more_ revealing at large scales. Because this is such a useful operation, ggplot2 comes with a shorthand for `geom_point(position = "jitter")`: `geom_jitter()`. Adding randomness seems like a strange way to improve your plot, but while it makes your graph less accurate at small scales, it makes your graph _more_ revealing at large scales. Because this is such a useful operation, ggplot2 comes with a shorthand for `geom_point(position = "jitter")`: `geom_jitter()`.
@ -680,8 +674,7 @@ There are a number of other coordinate systems that are occasionally helpful.
width = 1 width = 1
) + ) +
theme(aspect.ratio = 1) + theme(aspect.ratio = 1) +
xlab(NULL) + labs(x = NULL, y = NULL)
ylab(NULL)
bar + coord_flip() bar + coord_flip()
bar + coord_polar() bar + coord_polar()
@ -697,6 +690,8 @@ knitr::include_graphics("images/visualization-coordinate-systems.png")
1. Turn a stacked bar chart into a pie chart using `coord_polar()`. 1. Turn a stacked bar chart into a pie chart using `coord_polar()`.
1. What does `labs()` do? Read the documentation.
1. What's the difference between `coord_quickmap()` and `coord_map()`? 1. What's the difference between `coord_quickmap()` and `coord_map()`?
1. What does the plot below tell you about the relationship between city 1. What does the plot below tell you about the relationship between city