Displaying 3 results from an estimated 3 matches for "bonferoni".
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bonferroni
2017 Jun 06
1
glm and stepAIC selects too many effects
...r.
When I do a glm with many potential effects, and select a model using
stepAIC, many independent variables are selected even if there are no
relationship between dependent variable and the effects (all are random
numbers).
Do someone has a solution to prevent this effect ? Is it related to
Bonferoni correction ?
Is there is a ratio of independent vs number of observations that is
safe for stepAIC ?
Thanks
Marc
Example of code. When 2 independent variables are included, no effect is
selected, when 11 are included, 7 to 8 are selected.
x <- rnorm(15, 15, 2)
A <- rnorm(15, 20, 5)
B &...
2010 Apr 16
3
Is it ok to apply the z.test this way?
Dear R-users,
I want to check if certain values are from random distribution, that includes values between 0-1. So, it is not really normal even though shapiro.test says it is highly normal... Can I do something like this and think that the values given are right. z.test is from package TeachingDemos.
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2002 Oct 18
7
RAM usage
Hi,
I'm having problems while working with large data sets with R 1.5.1 in
windows 2000. Given a integer matrix size of 30 columns and 15000 rows
my function should return a boolean matrix size of about 5000 rows and
15000 columns.
First of all I tried to run this function on computer with 256 MB of
RAM. I increased memory limit of R with memory.limit() up to 512 MB. I
was inspecting