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typo in iteration.Rmd (#730)

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Zhuoer Dong 2018-11-19 21:35:12 +08:00 committed by Hadley Wickham
parent 3ff4336ca5
commit 323a84bd45
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iteration.Rmd
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@ -953,10 +953,10 @@ x %>% accumulate(`+`)
1. Implement your own version of `every()` using a for loop. Compare it with 1. Implement your own version of `every()` using a for loop. Compare it with
`purrr::every()`. What does purrr's version do that your version doesn't? `purrr::every()`. What does purrr's version do that your version doesn't?
1. Create an enhanced `col_sum()` that applies a summary function to every 1. Create an enhanced `col_summary()` that applies a summary function to every
numeric column in a data frame. numeric column in a data frame.
1. A possible base R equivalent of `col_sum()` is: 1. A possible base R equivalent of `col_summary()` is:
```{r} ```{r}
col_sum3 <- function(df, f) { col_sum3 <- function(df, f) {