Re: [R] A basic statistics question

2014-08-15 Thread peter dalgaard
On 13 Aug 2014, at 20:49 , (Ted Harding) ted.hard...@wlandres.net wrote: Indeed, this topic has got me wondering how many times I may have blindly used sd(x) in the past, as if it were going to give me the standard (sum(x - mean(x))^2)/length(x) result! At the risk of flogging a horse that

Re: [R] A basic statistics question

2014-08-15 Thread Joshua Wiley
On Wed, Aug 13, 2014 at 7:41 AM, Rolf Turner r.tur...@auckland.ac.nz wrote: On 13/08/14 07:57, Ron Michael wrote: Hi, I would need to get a clarification on a quite fundamental statistics property, hope expeRts here would not mind if I post that here. I leant that variance-covariance

Re: [R] A basic statistics question

2014-08-15 Thread Rolf Turner
On 16/08/14 01:29, Joshua Wiley wrote: On Wed, Aug 13, 2014 at 7:41 AM, Rolf Turner r.tur...@auckland.ac.nz mailto:r.tur...@auckland.ac.nz wrote: On 13/08/14 07:57, Ron Michael wrote: Hi, I would need to get a clarification on a quite fundamental statistics

Re: [R] A basic statistics question

2014-08-13 Thread Ted Harding
On 12-Aug-2014 22:22:13 Ted Harding wrote: On 12-Aug-2014 21:41:52 Rolf Turner wrote: On 13/08/14 07:57, Ron Michael wrote: Hi, I would need to get a clarification on a quite fundamental statistics property, hope expeRts here would not mind if I post that here. I leant that

Re: [R] A basic statistics question

2014-08-12 Thread Ted Harding
On 12-Aug-2014 19:57:29 Ron Michael wrote: Hi, I would need to get a clarification on a quite fundamental statistics property, hope expeRts here would not mind if I post that here. I leant that variance-covariance matrix of the standardized data is equal to the correlation matrix for the

Re: [R] A basic statistics question

2014-08-12 Thread Rolf Turner
On 13/08/14 07:57, Ron Michael wrote: Hi, I would need to get a clarification on a quite fundamental statistics property, hope expeRts here would not mind if I post that here. I leant that variance-covariance matrix of the standardized data is equal to the correlation matrix for the

Re: [R] A basic statistics question

2014-08-12 Thread Ted Harding
On 12-Aug-2014 21:41:52 Rolf Turner wrote: On 13/08/14 07:57, Ron Michael wrote: Hi, I would need to get a clarification on a quite fundamental statistics property, hope expeRts here would not mind if I post that here. I leant that variance-covariance matrix of the standardized data is