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eps
2006 Apr 23
2
distribution of the product of two correlated normal
Hi,
Does anyone know what the distribution for the product of two correlated
normal? Say I have X~N(a, \sigma1^2) and Y~N(b, \sigma2^2), and the
\rou(X,Y) is not equal to 0, I want to know the pdf or cdf of XY. Thanks
a lot in advance.
yu
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2007 Dec 28
1
unit attribute to list elements
...ge, part of which consists in
listing common physical constants (Planck's constant, the speed of
light in vacuum, etc). I'm wondering what would be a good way of
dealing with pairs of value/unit.
> constants <- list( cel = 2.99792458e8 , #m/s
> Z0 = 376.730313461, #ohm
> eps0 = 8.854187817e-12,#F/m
> mu0 = 4*pi*1e-7,#N/A^2
> G = 6.67428e-11 # m^3 kg-1 s-2
> )
I thought I could include the unit in the names attribute of each
element, as in :
> names(constants$cel)<- " speed of light in vacuum [m.s^-1]"
Writing this for every element is ver...