On 03/29/2010 04:17 AM, Charles C. Berry wrote:
...
Argh! Sorry for the 'thinko' (like a 'typo', but a misapplication of the
brain rather than the fingers)!
Well, a typo is the _result_ of a misapplication of the fingers to a
keyboard, so I would expect that if the result of thinking can be cal
Rolf Turner wrote:
> On 28/03/2010, at 11:50 AM, Ben Bolker wrote:
>
>> Gang Chen gmail.com> writes:
>>
>>> Anybody knows what functions can be used to calculate
>>> variance/covariance with complex numbers? var and cov don't seem to
>>> work:
>> How about:
>>
>> y <- complex(real=5:1,imag=2:6)
On Sun, 28 Mar 2010, Gang Chen wrote:
Thanks a lot for the help, Ben Bolker and Chuck!
Chuck, it seems your version needs a little modification. Instead of this:
xri <- matrix(rnorm(1)+1i*rnorm(1),nc=2)
crossprod(xri-colMeans(xri))/(nrow(xri)-1)
it seems to me it should be this (may
Gang Chen gmail.com> writes:
>
> Thanks a lot for the help, Ben Bolker and Chuck!
>
> Chuck, it seems your version needs a little modification. Instead of this:
>
> > xri <- matrix(rnorm(1)+1i*rnorm(1),nc=2)
> > crossprod(xri-colMeans(xri))/(nrow(xri)-1)
>
> it seems to me it should b
Thanks a lot for the help, Ben Bolker and Chuck!
Chuck, it seems your version needs a little modification. Instead of this:
> xri <- matrix(rnorm(1)+1i*rnorm(1),nc=2)
> crossprod(xri-colMeans(xri))/(nrow(xri)-1)
it seems to me it should be this (maybe there is a more elegant
modification
On Sat, 27 Mar 2010, Gang Chen wrote:
Anybody knows what functions can be used to calculate
variance/covariance with complex numbers? var and cov don't seem to
work:
How about?
xri <- matrix(rnorm(1)+1i*rnorm(1),nc=2)
crossprod(xri-colMeans(xri))/(nrow(xri)-1)
HTH,
Chuck
a
Gang Chen gmail.com> writes:
>
> Anybody knows what functions can be used to calculate
> variance/covariance with complex numbers? var and cov don't seem to
> work:
How about:
y <- complex(real=5:1,imag=2:6)
z <- complex(real=1:5,imag=6:10)
complex.var <- function(x) {
mx <- mean(x)
n <-
Anybody knows what functions can be used to calculate
variance/covariance with complex numbers? var and cov don't seem to
work:
> a
1
V1 0.00810014+0.00169366i
V2 0.00813054+0.00158251i
V3 0.00805489+0.00163295i
V4 0.00809141+0.00159533i
V5 0.00813976+0.00161850i
> var(a)
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