Displaying 4 results from an estimated 4 matches for "bcoefs".
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2007 Oct 03
2
Shading area under density curves
Hello,
I have a question regarding shading regions under curves to display
95% confidence intervals. I generated bootstrap results for the slope
and intercept of a simple linear regression model using the following
code (borrowed from JJ Faraway 2005):
> attach(allposs.nine.d)
> x<-model.matrix(~log(d.dist,10))[,-1]
> bcoef<-matrix(0,1000,2)
> for(i in 1:1000){
+
2012 Mar 18
1
Help with dlply, loop and column names
...loop I'm coming into trouble and I'm at the
moment really confused how to solve this problem:
I have the following function:
elecregtipos <- function(y){
z<-dlply(asturias.gen2011, .(tipo), function(x) lm(x[,y]~x$edad.media))
# rsq<-function(x) summary(x)$r.squared
# bcoefs<-ldply(z, function(x) c(coef(x), rsquare=rsq(x)))
# return (bcoefs)
return(z)
}
And I try to call it with:
for (y in c("upyd", "psoe", "pp", "fac", "iu")) {
eval(parse(text=paste(y,'.lm.tipos', '<- elecregtipos(',y...
2007 Jun 20
2
Extracting t-tests on coefficients in lm
I am writing a resampling program for multiple regression using lm(). I
resample the data 10,000 times, each time extracting the regression
coefficients. At present I extract the individual regression
coefficients using
brg = lm(Newdv~Teach + Exam + Knowledge + Grade + Enroll)
bcoef[i,] = brg$coef
This works fine.
But now I want to extract the t tests on these coefficients. I cannot
2012 Nov 21
0
Question about VAR (Vector Autoregression) in differences.
Folks,
I have been using the VAR {vars} program to find a fit for the following bi-variate time series (subset):
bivariateTS<-structure(c(0.950415958293559, 0.96077848972081, 0.964348957109053,
0.967852884998915, 0.967773510751625, 0.970342843688257, 0.97613937178359,
0.980118627997436, 0.987059493773907, 0.99536830931504, 1.00622672085718,
1.01198013845981, 1.01866618122606,