Displaying 2 results from an estimated 2 matches for "globulin".
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globalid
2008 May 09
2
How can one make stepAIC and lme
Dear R-help
I'm working on a large dataset which I have divided into 20 subsets based on similar features. Each subset consists of observations from different locations and I wish to use the location as a random effect.
For each group I want to select regressors by a stepwise procedure and include a random effect on the intercept. I use stepAIC() and lme(). (The lmer()-function doesn't
2007 May 27
1
How to reference or sort rownames in a data frame
As I was working through elementary examples, I was using dataset
"plasma" of package "HSAUR".
In performing a logistic regression of the data, and making the
diagnostic plots (R-2.5.0)
data(plasma,package='HSAUR')
plasma_1<- glm(ESR ~ fibrinogen * globulin, data=plasma, family=binomial())
layout(matrix(1:4,nrow=2))
plot(plasma_1)
I find that data points corresponding to rownames 17 and 23 are
outliers and high leverage.
I would then like to perform a fit without these two rows.
In principle this should be easy, using an update() with subset=-c(17...