Displaying 7 results from an estimated 7 matches for "mat3".

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2003 Sep 15

2

Persp and color

How can I control de "wrap-around" color behaviour in the persp
function ?
I am using something like :
persp(bb[1:100,2:97], col= rainbow(8,start=0.1, end=0.8)))
Depending on the rainbow length value I get several "wrap-around" blocks of
the selected color range...something that I wanted to avoid...
My idea is to use the color in order to make a separation from a
certain

2012 Oct 07

1

variances of random effects in coxme

...e in order to build Cox
models with complex random effects. Unfortunately, I sometimes get
surprising estimations of the variances of the random effects.
I ran models with different fixed covariates but always with the same 3
random effects defined by the argument
varlist=coxmeMlist(list(mat1,mat2,mat3), rescale = F, pdcheck = F,
positive=F). I get a few times exactly the same estimations of the
parameters of the random effects whereas the fixed effects of the models
are different:
Random effects
Group Variable Std Dev Variance
idp Vmat.1 0.10000000 0.01000000
Vmat.2 0.02236068...

2007 Nov 14

2

Generating these matrices going backwards

I have generated the following:
x=
E1 E2 E3
D1 0 0 1
D2 1 0 3
D3 0 2 0
y=
E1 E2 E3
D1 0 0 1.75
D2 1.75 0 1.3125
D3 0 3.5 0
Where x and y are linked by:
y =sum(x) * x / (rowSums(x)%o%colSums(x))
N=x[x[1:3,]>0]
R=y[y[1:3,]>0]
Now suppose I

2011 Apr 24

2

random roundoff?

...numerous matrix multiplications, I have a situation in
in which the result depends on the nature of nearby I/O. Thus,
with all arithmetic done with type double, and where values
are mostly in the range [-1.0e0,+1.0e0] or nearby, I do:
cerr << "some stuff" << endl;
mat3 = matmult(mat1,mat2);
I get a difference of the order 1.0e-15 depending on whether the
cerr line does or does not end in "endl" as shown.
I am imagining that there is some "randomness" in the roundoff
that depends on the I/O situation. Is this credible? Any other
suggest...

2007 Mar 25

1

anova-interaction

HI,
I am trying to perform ANOVA with 2 factors:
material (3), temperature(3). The interaction is significant. I tried
something like, ( summary(avt, split=list("temp:mat"=list("15"=1,
"70"=2, "125"=3))) is not correct).
Thanks,
av <- aov(time ~ mat*temp, data=dados)
avt <- aov(time ~ temp/mat)
summary(avt,

2010 Aug 25

3

approxfun-problems (yleft and yright ignored)

Dear all,
I have run into a problem when running some code implemented in the
Bioconductor panp-package (applied to my own expression data), whereby gene
expression values of known true negative probesets (x) are interpolated onto
present/absent p-values (y) between 0 and 1 using the *approxfun -
function*{stats}; when I have used R version 2.8, everything had
worked fine,
however, after

2016 Apr 23

9

[Bug 95095] New: NV46 (G72) Full screen artifacts in Freespace 2 SW OT mod

https://bugs.freedesktop.org/show_bug.cgi?id=95095
Bug ID: 95095
Summary: NV46 (G72) Full screen artifacts in Freespace 2 SW OT
mod
Product: Mesa
Version: git
Hardware: Other
OS: All
Status: NEW
Severity: normal
Priority: medium
Component: