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Fix typos (#158)

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behrman 2016-07-22 09:23:03 -07:00 committed by Hadley Wickham
parent 04093294b1
commit 52c609eaad
1 changed files with 5 additions and 5 deletions
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10
vectors.Rmd
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@ -181,11 +181,11 @@ Now that you understand the different types of atomic vector, it's useful to rev
There are two ways to convert, or coerce, one type of vector to another:
1. Explicit coercion happesn when you call a function like `as.logical()`,
1. Explicit coercion happens when you call a function like `as.logical()`,
`as.integer()`, `as.double()`, or `as.character()`. Whenever you find
yourself using explicit coercion, you should always check whether you can
make the fix upstream, so that the vector never had the wrong type in
the first place. For example, you may need to tweak you readr
the first place. For example, you may need to tweak your readr
`col_types` specification.
1. Implicit coercion happens when you use a vector in a specific context
@ -516,7 +516,7 @@ knitr::include_graphics("images/pepper-3.jpg")
1. Draw the following lists as nested sets:
1. `list(a, b, list(c, d), list(e, f))`
1 `list(list(list(list(list(list(a))))))`
1. `list(list(list(list(list(list(a))))))`
1. What happens if you subset a data frame as if you're subsetting a list?
What are the key differences between a list and a data frame?
@ -539,7 +539,7 @@ There are three very important attributes that are used to implement fundamental
* "names" are used to name the elements of a vector.
* "dims" make a vector behave like a matrix or array.
* "class" is used to implemenet the S3 object oriented system.
* "class" is used to implement the S3 object oriented system.
### S3
@ -627,7 +627,7 @@ typeof(y)
attributes(y)
```
If you use the packages outlined in this book, you should never encounter a POSIXlt. They do crop up in base R, because they are used extract specific components of a date (like the year or month). However, lubridate provides helpers for you to do this instead. Otherwise POSIXct's are always easier to work with, so if you find you have a POSIXlt, you should always convert it to a POSIXct with `as.POSIXct()`.
If you use the packages outlined in this book, you should never encounter a POSIXlt. They do crop up in base R, because they are used to extract specific components of a date (like the year or month). However, lubridate provides helpers for you to do this instead. Otherwise POSIXct's are always easier to work with, so if you find you have a POSIXlt, you should always convert it to a POSIXct with `as.POSIXct()`.
### Data frames and tibbles