# Re: [R] Two Way ANOVA

From: Daniel Malter <daniel_at_umd.edu>
Date: Wed, 19 Mar 2008 18:36:40 -0400

Hi,

your post is hardly readable because it is so spread out over several pages. Can you repost it?

Besides that I do not understand your question fully. The y is your dependent variable and as it looks the A*B would be Sulfur*Nitrogen if these are your variable names.

You can also take a look at the manuals that are available for free on cran. Most of them deal with ANOVA I would say.

Cheers,
Daniel

cuncta stricte discussurus

-----Ursprüngliche Nachricht-----
Von: r-help-bounces_at_r-project.org [mailto:r-help-bounces_at_r-project.org] Im Auftrag von David Mackovjak
Gesendet: Wednesday, March 19, 2008 6:02 PM An: r-help_at_r-project.org
Betreff: [R] Two Way ANOVA

First time using, the mailing list and I'm somewhat new to R, so excuse me if I do anything wrong.

I was wondering how I would set up a two way ANOVA for the following data:

```
Nitrogen
(0)

Nitrogen
(20)

(cell
means)

(cell
means)
[Sulfur means]
Sulfur (0)
4.48

5.76

4.52

(4.54)

5.64

(5.73)

[5.14]

4.63

5.78

Sulfur (3)
4.70

7.01

4.65

(4.64)

7.11

(7.05)

[5.84]

4.57

7.02

Sulfur (6)
5.21

5.88

5.23

(5.27)

5.82

(5.81)

[5.54]

5.38

5.73

Sulfur (9)
5.88

6.26

5.98

(5.81)

6.26

(6.30)

[6.11]

5.91

6.37

[Nitrogen means]
[5.10]

[6.22]

Source ofVariation                   SSSulfur
3.15
Nitrogen                                  7.59
Sulfur x Nitrogen                     3.84
Error                                       0.08Total
14.66

```

>From googling I know I want to get it to the form:

> fit <- aov(y ~ A*B, data=mydataframe)

But what would I set for A, B and y?

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