Thank's!
Using plot correctly solve the pb.
Le 27 nov. 2012 à 14:45, peter dalgaard a écrit :
>
> On Nov 27, 2012, at 11:06 , Jean-Paul Marcel Vallée wrote:
>
>> Dear R users,
>>
>> When I draw a circle with R on my Mac, the line is not smooth at 0 and 180
>> degree even when I am using a high number of point. Is there a way to
>> improve this rendering in the quartz window?
>>
>> Thank's
>>
>> JPV
>>
>>
>>
>> f2 <- function(x){
>> (1-x^2)^.5
>> }
>>
>> x1min=-100000;
>> x1max=100000;
>> sf=100000;
>>
>> plot(f2, (x1min:x1max)/sf, col="blue", ylim=range(-1,1))
>
> Read the help page for plot.function (again?) and notice that its second
> argument does not do what I think you think it does. Increasing the value of
> n= might be more fruitful.
>
> --
> Peter Dalgaard, Professor,
> Center for Statistics, Copenhagen Business School
> Solbjerg Plads 3, 2000 Frederiksberg, Denmark
> Phone: (+45)38153501
> Email: [email protected] Priv: [email protected]
>
>
>
>
>
>
>
>
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