[R] Polygon

[Steven Yen]

Great. Thanks! It did wonders.
1. Is there a way to suppress the obvious tick stops (-3,-2,-1,0,1,2,3) 
and mark only the ticks -1.96 and 1.96.
2. Better yet, to draw vertical lines at x = -1.96 and x = 1.96.
Thanks.
Steven

On 10/3/2018 12:51 AM, Rui Barradas wrote:
> Hello,
>
> Continue with
>
>
> polygon(-rev(cord.x), rev(cord.y), col = 'skyblue')
>
>
> Hope this helps,
>
> Rui Barradas
>
> Às 17:25 de 02/10/2018, Steven Yen escreveu:
>> Can someone help me with polygon. The following codes are self-runnable
>> and mark a shaded area under the standard normal curve in the x-range
>> (-3,-1).
>> Is there a way to also mark the area in (1,3), at the same time.
>> That is, I want shaded areas in both tails. Thank you...
>>
>> ===
>> # Create data for the area to shade
>> cord.x <- c(-3,seq(-3,-1,0.01),-1)
>> cord.y <- c(0,dnorm(seq(-3,-1,0.01)),0)
>>
>> # Make a curve
>> curve(dnorm(x,0,1), xlim=c(-3,3), main='Standard Normal')
>>
>> # Add the shaded area.
>> polygon(cord.x,cord.y,col='skyblue')
>>
>

-- 
styen using ntu.edu.tw (S.T. Yen)


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