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 <[EMAIL PROTECTED]> 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
> USPS: P.O.Box 400400 Charlottesville, VA 22904-4400
> Parcels: Room 102 Gilmer Hall
> McCormick Road Charlottesville, VA 22903
> Office: B011 +1-434-982-4729
> Lab: B019 +1-434-982-4751
> Fax: +1-434-982-4766
> WWW: http://www.people.virginia.edu/~mk9y/
>
>
>
>
>
> [[alternative HTML version deleted]]
>
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>
--
Henrique Dallazuanna
Curitiba-Paraná-Brasil
25° 25' 40" S 49° 16' 22" O
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