# s20x

A repository for the University of Auckland s20x R library. This
library is used in our large undergrad classes STATS 201, STATS 208 and
BIOSCI 209

# Build Notes

We will attempt to add information about the changes in each new
release (whether it makes it to CRAN or not) here, from version 3.1-21
onwards

## 3.1-21

Ben Stevenson added some code to summary2way so the attribute
information from `TukeyHSD`

is preserved. That is so you see
this

```
> summary2way(fit, page = "interaction")
Tukey multiple comparisons of means
95% family-wise confidence level
Fit: aov(formula = fit)
$`store:crust`
```

instead of this

```
> summary2way(fit, page = "interaction")
$`store:crust`
```

## 3.1-24

A new function called `modcheck`

has been added. This
allows the plotting of all four standard 20x model checking plots: a
pred-res or equality of variance plot, a normal Q-Q plot, a histogram of
the residuals, and a Cook’s distance plot, to be drawn on the same plot
at once. This function needed a much more flexible version of
`normcheck`

, and needed modifications to
`eovcheck`

and `cooks20x`

. I have not put it on
CRAN yet because of the chance that it will fail for our current
students. We *really* need some unit testing in this package so
that this process can be sped up.