# [R] Means of Monte Carlo simulated lists

Warnes, Gregory R gregory_r_warnes at groton.pfizer.com
Fri Aug 2 22:31:29 CEST 2002

```If you simply want an overall average of all the values do:

mean( unlist( sim.theta ) )

If you want something else, you'll have to describe what you need more
clearly.

-Greg

> -----Original Message-----
> From: Giovanni Petris [mailto:GPetris at uark.edu]
> Sent: Friday, August 02, 2002 1:05 PM
> To: R-help
> Subject: [R] Means of Monte Carlo simulated lists
>
>
>
> Hello,
>
> I am doing simulations, and I generate a list at each iteration (with
> three component matrices in the example below), saving the results in
> a list. For example, after two iterations, I have something like
>
> > str(sim.theta)
> List of 2
>  \$ :List of 3
>   ..\$ : num [1:6, 1:4]  -3.67  -1.07  -2.99 -18.38  -3.26 ...
>   ..\$ : num [1:6, 1:6] -7.56 -3.14 -4.99  1.03  2.79 ...
>   ..\$ : num [1:6, 1:4]  -0.506   2.802   1.879 -13.457  -3.172 ...
>  \$ :List of 3
>   ..\$ : num [1:6, 1:4]  9.664 17.242 13.555 -0.368 16.426 ...
>   ..\$ : num [1:6, 1:6] 10.54  8.97 10.89 10.76  8.81 ...
>   ..\$ : num [1:6, 1:4]  4.40 10.58 12.00  1.00  7.71 ...
>
> Could anybody tell me what is an efficient way of computing the
> averages of the simulated values?
>
> Giovanni
>
> --
>
>  __________________________________________________
> [                                                  ]
> [ Giovanni Petris                 GPetris at uark.edu ]
> [ Department of Mathematical Sciences              ]
> [ University of Arkansas - Fayetteville, AR 72701  ]
> [ Ph: (479) 575-6324, 575-8630 (fax)               ]
> [ http://definetti.uark.edu/~gpetris/              ]
> [__________________________________________________]
>
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```