Displaying 4 results from an estimated 4 matches for "ssef".
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sse
2011 Jun 07
1
variable selection in linear regression
...- sqrt(sum(res^2)/(n-ncol(X)))
cv <- sigma.hat^2*ginv(t(X)%*%X)
se <- sqrt(diag(cv))
pc <- matrix(0,nrow=1,ncol=d)
resF <- matrix(0, nrow=n, ncol=d)
pf <- matrix(0, nrow=1, ncol=d)
for(j in 1:d){
pc[,j] <- cor(x=(x[,j]), y=(mydata[,1]))
resF[,j] <- lsfit(x[,j], y)$residuals
sseF <- t(as.matrix(apply(resF^2, 2, sum)))
resR <- lm(y~1,data=mydata)$residuals
sseR <- sum(resR^2)
dfF <- n-2
dfR <- n-1
pf[,j] <- ((sseR-sseF[,j])/(dfR-dfF))/(sseF[,j]/dfF)
max.pf=max(pf)
max.pc=max(pc)
Thank you and looking forward to hear some replies.
Sincerely,
Iba
Univ...
2008 Jan 31
2
Box Plot With Groups being numbers
I would like to Summarize values that are repeated measures at a
certain river mile with box plot i.e.
The data matrix looks like this
123 124 125 #fiver mile
0.5 0.6 0.7
0.4 0.5 0.6
... ... ... #values
I would like to make a boxplot with the river mile naming the
different box plot. How do you suppress the X123?
Stephen
--
Let's not
2008 Sep 11
3
periodicity validation
There is a series of data contains time in fixed step and energy
varying with time, how to test its periodicity?In R, it seems there is
no direct tools since I have search the R manual with periodic and I
have not found any related topic.
Thanks a lot
2008 Sep 22
1
R-help Digest, Vol 67, Issue 23
...ASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> > and provide commented, minimal, self-contained, reproducible code.
>
>
>
>
------------------------------
Message: 7
Date: Sun, 21 Sep 2008 12:23:02 -0400
From: "stephen sefick" <ssefick@gmail.com>
Subject: Re: [R] periodicity validation
To: "yuankun shi" <shiyuankun.debian@gmail.com>, "R-help Mailing List"
<r-help@r-project.org>
Message-ID:
<c502a9e10809210923m10728682wf4f8d41e75dce71e@mail.gmail.com>
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