[R] Output design question

2008-07-16 Thread Michael Kubovy 
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  -1.1910.249
---
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 notgroup Trt?
_
Professor Michael Kubovy
University of Virginia
Department of Psychology
USPS: P.O.Box 400400Charlottesville, VA 22904-4400
Parcels:Room 102Gilmer Hall
 McCormick RoadCharlottesville, 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/





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Re: [R] Output design question

2008-07-16 Thread 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 [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  -1.1910.249
 ---
 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 notgroup Trt?
 _
 Professor Michael Kubovy
 University of Virginia
 Department of Psychology
 USPS: P.O.Box 400400Charlottesville, VA 22904-4400
 Parcels:Room 102Gilmer Hall
 McCormick RoadCharlottesville, 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/





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 and provide commented, minimal, self-contained, reproducible code.




-- 
Henrique Dallazuanna
Curitiba-Paraná-Brasil
25° 25' 40 S 49° 16' 22 O

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