[R] About lm()

[marcelo]

Dear Mr. and Mrs. 

I'm very grateful for these software and this list.
My question is:
when a use linear multiple regression (lm()) for my data,
abundance ichthyoplankton ~ salinity + temperature + month of the 
year(f1 is a factor: 1 for january, 2 for february, ..., 12 for december), 
the summary() of results is
...
Coefficients:
                 Estimate Std. Error t value Pr(>|t|)    
(Intercept)       0.726347   0.285607   2.543 0.011217 *  
temperature	 -0.011410   0.014200  -0.804 0.421978    
salinity	 -0.018194   0.002453  -7.416 3.81e-13 ***
f1.L             -0.060886   0.093818  -0.649 0.516584    
f1.Q              0.856714   0.196832   4.353 1.56e-05 ***
f1.C              0.522526   0.078261   6.677 5.27e-11 ***
f1^4              0.570152   0.095059   5.998 3.33e-09 ***
f1^5             -0.292748   0.077436  -3.781 0.000171 ***
...
f1^10             0.182789   0.082543   2.214 0.027145 *  
f1^11             0.329844   0.094470   3.492 0.000513 ***

What does mean f1.L, f1.Q, f1.C ??
Thanks in advance.
-- 
Marcelo Alexandre Bruno - Pos-graduacao Oceanografia Biologica
Departamento de Oceanografia -  Laboratorio de Ecologia do Ictioplancton
(0xx53) 2336529 - Rio Grande - RS - BRAZIL

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