Displaying 4 results from an estimated 4 matches for "neagtive".
2002 Nov 07
4
negative and positive values in diff. colors
...ion residuals as geodata points. I would like to
display them in the following way:
-negative values using pch=20 (filled circle)
-positive values using pch=1 (empty circle)
while using the cex.max=5, cex.min=0.1 for points() to represent the
residuals value. Basically I would like to distinguish neagtive and
positive values at my map. How to do this.
Thanks in advance,
Rado
--
Radoslav Bonk M.S.
Dept. of Physical Geography and Geoecology
Faculty of Sciences, Comenius University
Mlynska Dolina 842 15, Bratislava, SLOVAKIA
tel: +421 2 602 96 250 e-mail: rbonk at host.sk
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2006 May 18
1
Negatives density values (PR#8876)
...0
[13] 2.056151e-04 -1.407219e-16 -3.575895e-18 -1.979607e-16
[17] -1.574544e-17 -2.257917e-17 -2.305234e-16 4.052727e-18
>
> #A plot of the "fluctuations" near zero
> plot(result$x,result$y,type="l",xlim=c(-1,1),ylim=c(-10^-14,10^-14))
> abline(h=0)
>
> #All neagtives value of density are "near equal" to zero
> all(apply(as.matrix(result$y[result$y<0]),1,all.equal, target=0)==TRUE)
[1] TRUE
> sessionInfo()
R version 2.2.1, 2005-12-20, i386-pc-mingw32
attached base packages:
[1] "methods" "stats" "graphics&q...
2010 Aug 20
2
U value from wilcox.test
...compare the U value
of the Mann-Whitney test to critical value for table rather than to rely on
the p-value.
Is W value correspond to U value ?
>From the help I understand that W=U+m*(m+1)/2, is this true ?
In the case it is, my U values would be U=W-6=-6!! I thought that a U value
could not be neagtive.
I would be happy to have any information about how to obtain the U value
from the Mann-Withney test (wilcox.test()) in order to be able to compare it
with table of critical U value commonly found.
Thanks a lot for your time and help
Have a nice day,
Chlo?
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2010 Jun 20
2
compute coefficient of determination (R-squared) for GLM (maximum likelihood)
Dear,
I want to compute coefficient of determination (R-squared) to complement AIC
for model selection of
multivariable GLM.
However, I found this is not a built-in function in glm. neither is it
available through reviewing the question in the R-help archive.
Please kindly help and thanks a lot.
Elaine
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