R help - Jul 2010 - Help in the legend()

Hi R-users,

I was plotting the differences of the variances of the three estimators- T^(1),
T^(2), T^(3), ofcourse taking two at a time. I was using the expression() in the
legend function in order to show which line correspond to which of the
difference, but the following that I had used didn't gave desired result. I
would be grateful, if you help me out.

plot(n, pg, type="l",xlab="n",ylab="Differences of the
variances",ylim=c(-0.0012,0.0023), xlim=c(0,60));
lines(gs,lty = 2)
lines(ps,lty=5)

legend(30, 0.0021, expression( c ( var(t^(3))-var(t^(2)),
var(t^(2))-var(t^(1))), var("t^(3))-var(t^(1)) ) ), lty=c(1,2,5))

Thanks.
Shant


      
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On Jul 5, 2010, at 8:06 PM, Shant Ch wrote:
> Hi R-users,
>
> I was plotting the differences of the variances of the three  
> estimators- T^(1), T^(2), T^(3), ofcourse taking two at a time. I  
> was using the expression() in the legend function in order to show  
> which line correspond to which of the difference, but the following  
> that I had used didn't gave desired result. I would be grateful, if  
> you help me out.
>
> plot(n, pg, type="l",xlab="n",ylab="Differences of
the
> variances",ylim=c(-0.0012,0.0023), xlim=c(0,60));
> lines(gs,lty = 2)
> lines(ps,lty=5)
>
> legend(30, 0.0021, expression( c ( var(t^(3))-var(t^(2)), var(t^(2))- 
> var(t^(1))), var("t^(3))-var(t^(1)) ) ), lty=c(1,2,5))
>
Have you consider offering a toy set of objects which defines "t",  
"n", and "pg".
> Thanks.
> Shant
>
>
>
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>
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