# immer

From MASS v7.3-0
by Brian Ripley

##### Yields from a Barley Field Trial

The `immer`

data frame has 30 rows and 4 columns. Five varieties of
barley were grown in six locations in each of 1931 and 1932.

- Keywords
- datasets

##### Usage

`immer`

##### source

Immer, F.R., Hayes, H.D. and LeRoy Powers (1934)
Statistical determination of barley varietal adaptation.
*Journal of the American Society for Agronomy*
**26**, 403--419.

Fisher, R.A. (1947)
*The Design of Experiments.* 4th edition. Edinburgh: Oliver and Boyd.

##### References

Venables, W. N. and Ripley, B. D. (1999)
*Modern Applied Statistics with S-PLUS.* Third
Edition. Springer.

##### Examples

```
immer.aov <- aov(cbind(Y1,Y2) ~ Loc + Var, data = immer)
summary(immer.aov)
immer.aov <- aov((Y1+Y2)/2 ~ Var + Loc, data = immer)
summary(immer.aov)
model.tables(immer.aov, type = "means", se = TRUE, cterms = "Var")
```

*Documentation reproduced from package MASS, version 7.3-0, License: GPL-2 | GPL-3*

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