[R] Simple 2-Way Anova issue in R

[znd]

Ah, I believe I constructed my *.csv wrong in that I only had 1 observation
within groups whereas I needed at least 2.

Originally I had:

Year     Depth     Biomass1     Biomass2
1999     10         14.3           14.7
1999     15         14.7           15.6
etc.

but I switched this to:

Year     Depth     Biomass
1999     10         14.3
1999     10         14.7
1999     15         15.1
1999     15         15.6

I believe this may be the appropriate way to collapse my biomass data in
order to perform a 2-way anova.

If not feel free comment and thanks for the help.
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