mean.rv | R Documentation |
mean.rv
computes the distribution of the arithmetic average of its
argument rv
object.
## S3 method for class 'rv' mean(x, ...)
x |
an object |
... |
further arguments passed to or from other methods |
mean
gives the distribution (that is, a random variable object) of
the statistic sum x_i/n
(sum(x)/length(x)
).
In particular, mean(x)
of a random vector x
of length one is
equal to x
as it would be in the case of numerical x.
To find the expectation of a random vector x
(that is, the individual
means of random components in a vector), use rvmean(x)
(same as
E(x)
and Pr(x)
).
Jouni Kerman jouni@kerman.com
Kerman, J. and Gelman, A. (2007). Manipulating and Summarizing Posterior Simulations Using Random Variable Objects. Statistics and Computing 17:3, 235-244.
See also vignette("rv")
.
rvmean
y <- rvnorm(10, mean=0, sd=1) m1 <- mean(y) m2 <- rvnorm(1, mean=0, sd=1/sqrt(10)) print(c(m1, m2)) # should have the same distribution
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.