Displaying 3 results from an estimated 3 matches for "glt".
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2011 Nov 18
1
Ensuring a matrix to be positive definite, case involving three matrices
...im' to minimize the LogLik
(by the way, GGt is always positive definite). Except for the first
parameters that I give to 'optim', I can't control its tested parameters,
which will be used as the inputs of 'fkf' (except, as I sad, for Gt, because
I ask 'optim' to give GLt, the lower triangular matrix of Gt, giving as
input to 'fkf' GLt %*% t(GLt) ).
Since the process stops every time a non positive matrix Ft appears, I would
like to know if are there any transformations that could be applied to GGt
and P0, given by 'optim', to be sure that Ft will b...
2011 Feb 27
1
two-way unbalanced ANOVA
...s applied my data to this helpful tutorial:
http://www.biw.kuleuven.be/vakken/statisticsbyr/ANOVAbyRr/UnbalancedTwoWayANOVA.htm
I found that my interaction term was insignificant, so my model was
reduced to a two-factor model. But then I got stuck on the part where I
use a general linear test (GLT) to determine whether I should use a two-
or one- factor model to get my correct sum of squares decomposition for
my unbalanced ANOVA. I found that there was significance between my two-
and one- factor models (p=2.124x10^-6). But now I do not know which
model to use for obtaining the correct s...
2009 Apr 16
3
segment between points on different plots
Hi,
I need to draw a line segment between two points on different plots in the
same multigraph.I've tried looking at the zoominplot function in plotrix but
havent understood much.any help is appreciated
~Aks
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