[R] Need help on having multiple distributions in one graph

[Frank E Harrell Jr]

On 05/03/2010 11:14 PM, Jorge Ivan Velez wrote:
> Hi Joseph,
>
> How about this?
>
> matplot(cbind(m0, m1, m3, m4), type = 'l', lty = 1)
> legend('topright', paste('m', c(0, 1, 3, 4), sep = ""), lty = 1, col = 1:4)
>
> See ?matplot and ?legend for details.
>
> HTH,
> Jorge

Also see the labcurve function in the Hmisc package, which will draw 
curves and label them where they are most separated.

Frank

>
>
> On Mon, May 3, 2010 at 6:42 PM,<>  wrote:
>
>> R-listers:
>>
>> I have searched the help files and everything I have related to R graphics.
>> I cannot find how to graph y against
>> several distributions on a single graph. Here is code for creating 4
>> Poisson distributions with different mean values, although I would prefer
>> having it in a loop: The top of the y axis for the first distribution, with
>> count of 0, is .6, which is the highest point for any  of the distributions.
>>
>> obs<- 1:20 y<- obs-1
>> m0<- (exp(-.5) * .5^y)/factorial(y)
>> m1<- (exp(-1) * 1^y)/factorial(y)
>> m3<- (exp(-3) * 3^y)/factorial(y)
>> m4<- (exp(-5) * 5^y)/factorial(y)
>>
>> How do I plot the graph of each distribution on y, all on a single graph? I
>> have spent so many hours on this,
>> which is really quite simple in applications such as Stata. Thanks very
>> much for the assistance:
>>
>> Joseph Hilbe
>> hilbe at asu.edu  or jhilbe at aol.com
>>



-- 
Frank E Harrell Jr   Professor and Chairman        School of Medicine
                      Department of Biostatistics   Vanderbilt University