Fixed spelling of purrr on line 121 (hadley#208)

model-basics.Rmd

@@ -118,7 +118,7 @@ measure_distance <- function(mod, data) {
 measure_distance(c(7, 1.5), sim1)
 ```
 
-Now we can use purrrr to compute the distance for all the models defined above. We need a helper function because our distance function expects the model as a numeric vector of length 2.
+Now we can use purrr to compute the distance for all the models defined above. We need a helper function because our distance function expects the model as a numeric vector of length 2.
 
 ```{r}
 sim1_dist <- function(a1, a2) {