new to R (vegan) , confused on data format

[griley6]

I have never used this before or anything like it! I'm doing an ecology assignment and need to create a "Non-metric dimensional scaling attempts to plot the similarity of sites in two dimensions". I have data of fish surveys from 7 different sites, 7 divers, and roughly 50 species. I keep getting the error that my data must be numerical but I thought it was so I'm not sure how my data should be formatted.
This is what I have entered. Thank you for any assistance!

install.packages()
library("vegan")
data("Book3")
diversity(Book3, index = "shannon")

[veronix]

Please post a snippet of your data so we can confirm whether it is in the right format.

[jrkrideau]

A handy way to supply some sample data is the dput() function. In the case of a large dataset something like dput(head(mydata, 100)) should supply the data we need.

[griley6]

Species Name	Site	Diver	Diver	Diver	Diver	Diver	Diver	Diver
		MF	EK	GR	CRC	CBC	CE	MS
Slate Pencil Sea Urchin	La Loberia	3	3	2	0	2	2	2
Black Urchin	La Loberia	0	0	0	0	0	0	0
Green Urchin	La Loberia	0	0	0	0	0	0	0
Black Striped Salema	La Loberia	1	0	2	3	2	3	2
Tomtate Grunt	La Loberia	0	0	2	2	0	0	0

[jrkrideau]

Thanks but that format for the data is not really very useful. Please supply some data in dput() format as suggested above.

Actually now that I look at the code it is not clear where *Book3 is coming from.

When I try

library(vegan)
data("Book3")
Book3

I get

Error: object 'Book3' not found

so it looks like Book3 is not a dataset included with vegan. How are you loading Book3?