Displaying 5 results from an estimated 5 matches for "center2".
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2010 Sep 12
3
reshape matrix entities to columns
...I want to change the structure of the dataset and I am wondering how that might
be possible in R
A main data looks like this: some entities are empty
Age No. Age No. Age No.
Center1 5 2 8
7
Center2 10 7 20
9 4 10
But what I want the data to look like is
Age 1 2 3
4 5 6 7 8
9...
2007 Jun 01
2
Interaction term in lmer
...Intercept) 5e-10 2.2361e-05
number of obs: 14, groups: center, 7
Estimated scale (compare to 1) 0.2672612
Fixed effects:
Estimate Std. Error z value Pr(>|z|)
(Intercept) -1.060869 0.065372 -16.2282 < 2e-16 ***
trt2 1.118029 0.086842 12.8743 < 2e-16 ***
center2 -0.325428 0.504256 -0.6454 0.51869
center3 -0.325440 0.504258 -0.6454 0.51868
center4 0.655407 0.413449 1.5852 0.11292
center5 -0.325433 0.504256 -0.6454 0.51869
center6 -0.325421 0.504255 -0.6454 0.51870
center7 0.655422 0.413448 1.5853 0.1...
2010 Sep 12
0
replacing matrix column entities as columns name
...ng R helpers
I am not familiar with R but I have to use it to analyze data set that I have
(30,000 20,000)
I want to change the structure of the dataset and I am wondering how that might
be possible in R
> Age No. Age No. Age No.
>
> Center1 5 2 8 7
>
> Center2 10 7 20 9 4 10
>
> column name = sequence of age-no.
>
>
>
> But what I want the data to look like is this
>
> Age 1 2 3 4 5 6 7 8 9 10 .. 20
>
> Center1 2 7
>
> Cen...
2004 Jan 21
1
outlier identification: is there a redundancy-invariant substitution for mahalanobis distances?
...obust covariance underestimation
eqscplot(x=d, y=m); abline(0,1)
# Now I add a highly redundant column in hope the distances between cases
will not change
x2 <- cbind(x, x[,1]+rnorm(n, sd=0.01))
# scale, otherwise euclidean fails
x2 <- scale(x2)
cr2 <- cov.rob(x2, method="mcd")
center2 <- cr2$center
d2 <- rowSums(t(t(x2)-center2)^2)
m2 <- as.vector(mahalanobis(x2, center2, cr2$cov))
# though equally scaled, euclidean and mahalanobis diverge
eqscplot(x=d2, y=m2); abline(0,1)
# mahalanobis distances are obviously not redundancy invariant
eqscplot(x=m, y=m2); abline(0,1)
#...
2006 Jun 26
0
sortables and accept question
...eft 4</div>
<div class="rail" id="left5">left 5</div>
</div>
<div id="list2" style="float:left;">
<div class="center" id="center1">center 1</div>
<div class="center" id="center2">center 2</div>
<div class="center" id="center3">center 3</div>
<div class="center" id="center4">center 4</div>
<div class="center" id="center5">center 5</div>
</div>
<di...