C:\sta6167>C:\progra~1\R\R-2.4.0\bin\Rterm --vanilla 

R version 2.4.0 (2006-10-03)
Copyright (C) 2006 The R Foundation for Statistical Computing
ISBN 3-900051-07-0

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> pdf("westnilesc.pdf")
> 
> wnsc <- read.fwf("C:\\data\\westnilesc.dat", 
+ width=c(24,3,8,8,8,8,8,12,12),
+ col.names=c('cnty','wnbird', 'wnequine', 'farms', 'area', 
+  'pop', 'humdens', 'posbrdrt', 'poseqnrt'))
> 
> wnsc1 <- data.frame(wnsc)
> 
> attach(wnsc1)
> 
> wnsc.mod1 <- glm(formula = wnequine ~ offset(log(farms)) + 
+  posbrdrt + humdens + posbrdrt:humdens, family=poisson(log))
> 
> summary(wnsc.mod1)

Call:
glm(formula = wnequine ~ offset(log(farms)) + posbrdrt + humdens + 
    posbrdrt:humdens, family = poisson(log))

Deviance Residuals: 
    Min       1Q   Median       3Q      Max  
-1.6503  -1.0730  -0.7553   0.3282   2.5228  

Coefficients:
                   Estimate Std. Error z value Pr(>|z|)    
(Intercept)      -6.982e+00  3.664e-01 -19.055  < 2e-16 ***
posbrdrt          5.330e+03  1.596e+03   3.340 0.000837 ***
humdens           5.903e-04  1.673e-03   0.353 0.724188    
posbrdrt:humdens  2.600e+01  1.238e+01   2.100 0.035706 *  
---
Signif. codes:  0 '***' 0.001 '**' 0.01 '*' 0.05 '.' 0.1 ' ' 1 

(Dispersion parameter for poisson family taken to be 1)

    Null deviance: 109.324  on 45  degrees of freedom
Residual deviance:  62.007  on 42  degrees of freedom
AIC: 122.54

Number of Fisher Scoring iterations: 6

> 
> 
> 
> 
> dev.off()
null device 
          1 
>