[R] numerical subscripts in a loop in a plot

[Eik Vettorazzi]

Hi Alexander,
there is a simple solution using bquote
for(i in 1:10){
   text(i, 0,bquote(epsilon[.(i)]))
}

hth.


Alexander Nervedi schrieb:
> Hi R Graphics Gurus
>
> I am unable to figure out this issues with unevaluated expressions. I'm trying to create a graphic where I calculate the residual from a regression and want to mark each residual with its observation number. So something like
>
> plot(0,0, type = "n", xlim = c(0,10))
> for(i in 1:10){
>    text(i, 0, substitute(paste(epsilon[i])))
>    
> }
>
> except that i end up pasting \epsilon_i 10 times and not \epsilon_1, ..., \epsilon_10. i'd be much obliged if anyone can put me out of my misery and let me know how i am goofing up.
>
> many thanks
>  		 	   		  
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-- 
Eik Vettorazzi
Institut für Medizinische Biometrie und Epidemiologie
Universitätsklinikum Hamburg-Eppendorf

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