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Update pipes.Rmd (#290) 

Typo
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S'busiso Mkhondwane 2016-08-19 20:39:48 +02:00 committed by Hadley Wickham
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@ -56,7 +56,7 @@ The main downside of this form is that it forces you to name each intermediate e
Whenever I write code like this, I invariably use the wrong number on one line and then spend 10 minutes scratching my head and trying to figure out what went wrong with my code.
You may also worry that this form creates many copies of your data and takes up a lot of memory. Suprisingly, that's not the case. First, note that proactively worrying about memory is not a useful way to spend your time: worry about it when it becomes a problem (i.e. you run out of memory), not before. Second, R isn't stupid, and it will share columns across data frames, where possible. Let's take a look at an actual data manipulation pipeline where we add a new column to `ggplot2::diamonds`:
You may also worry that this form creates many copies of your data and takes up a lot of memory. Surprisingly, that's not the case. First, note that proactively worrying about memory is not a useful way to spend your time: worry about it when it becomes a problem (i.e. you run out of memory), not before. Second, R isn't stupid, and it will share columns across data frames, where possible. Let's take a look at an actual data manipulation pipeline where we add a new column to `ggplot2::diamonds`:
```{r}
diamonds <- ggplot2::diamonds