[R] Output design question

[Henrique Dallazuanna]

I don't know, but you can change it by:

out_sum <- summary(lm.D9 <- lm(weight ~ group))
rownames(out_sum$coefficients)[2] <- "group Trt"
out_sum

On Wed, Jul 16, 2008 at 12:51 PM, Michael Kubovy <kubovy at virginia.edu> wrote:
> Dear R-helpers,
>
> I was curious why the output of summary (and many other functions in
> R) does not add a separator between the name of a factor and the label
> of a level (e.g., in the example below, 'group Trt'). If the user had
> lower case labels (e.g., 'trt'), the output would be particularly hard
> to read.
> ctl <- c(4.17,5.58,5.18,6.11,4.50,4.61,5.17,4.53,5.33,5.14)
> trt <- c(4.81,4.17,4.41,3.59,5.87,3.83,6.03,4.89,4.32,4.69)
> group <- gl(2,10,20, labels=c("Ctl","Trt"))
> weight <- c(ctl, trt)
> summary(lm.D9 <- lm(weight ~ group))
> gives
> Call:
> lm(formula = weight ~ group)
>
> Residuals:
>     Min      1Q  Median      3Q     Max
> -1.0710 -0.4938  0.0685  0.2462  1.3690
>
> Coefficients:
>             Estimate Std. Error t value Pr(>|t|)
> (Intercept)   5.0320     0.2202  22.850 9.55e-15 ***
> groupTrt     -0.3710     0.3114  -1.191    0.249
> ---
> Signif. codes:  0 '***' 0.001 '**' 0.01 '*' 0.05 '.' 0.1 ' ' 1
>
> Residual standard error: 0.6964 on 18 degrees of freedom
> Multiple R-squared: 0.07308,    Adjusted R-squared: 0.02158
> F-statistic: 1.419 on 1 and 18 DF,  p-value: 0.249
> Why not"group Trt"?
> _____________________________
> Professor Michael Kubovy
> University of Virginia
> Department of Psychology
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>
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-- 
Henrique Dallazuanna
Curitiba-Paraná-Brasil
25° 25' 40" S 49° 16' 22" O