optima (plural) -> optimum (singular) (#579)

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Tim Waterhouse 2018-06-20 03:56:48 -04:00 committed by Hadley Wickham
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@ -223,7 +223,7 @@ These are exactly the same values we got with `optim()`! Behind the scenes `lm()
to the linear model.
1. One challenge with performing numerical optimisation is that it's only
guaranteed to find one local optima. What's the problem with optimising
guaranteed to find one local optimum. What's the problem with optimising
a three parameter model like this?
```{r}