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Delete "echo = false" (#457)

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Julian During 2016-10-06 20:53:15 +02:00 committed by Hadley Wickham
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commit 81e8811439
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model-basics.Rmd
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@ -352,7 +352,7 @@ The following sections expand on how this formula notation works for categorcal
Generating a function from a formula is straight forward when the predictor is continuous, but things get a bit more complicated when the predictor is categorical. Imagine you have a formula like `y ~ sex`, where sex could either be male or female. It doesn't make sense to convert that to a formula like `y = x_0 + x_1 * sex` because `sex` isn't a number - you can't multiply it! Instead what R does is convert it to `y = x_0 + x_1 * sex_male` where `sex_male` is one if `sex` is male and zero otherwise:
```{r, echo = FALSE}
```{r}
df <- tribble(
~ sex, ~ response,
"male", 1,