ANOVA with empty cells

[Isaac Neuhaus]

Is there a function to calculate ANOVA for a design with empty cells? 
Please see the data below (f1 and f2 are the independent variables and 
response is the dependent variable). The model that I would like to fit is:

response ~ f1 + f2 + f1*f2

Isaac

     f1   f2   response
S1    1    1    7
S2    2    1    1
S3    3    1    4
S4    4    2    5
S5    3    2    5
S6    1    2    9
S7    3    2    5
S8    1    2    10



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