How to remove leverage from data.

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David Craig
David Craig 2012-1-18
Hi, I am comparing two data sets and examining some statistics using 'regstats'.
My code goes something like,
Stats = regstats(data1,data1,'linear')
qqplot(Stats.r)
The plot shows some outliers in the residuals, anyone know how I can remove them??

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回答（1 个）

David Craig
David Craig 2012-1-18
Have made some progress, I can find the outliers but not remove them,
Stats = regstats(data1,data1,'linear')
qqplot(Stats.r)
mu=mean(Stats.r)
sigma=std(Stats.r)
[n,m]=size(Stats.r)
outliers=abs(Stats.r - mu(ones(n,1),:)) > 3*sigma(ones(n,1),:);
nout=sum(outliers)
Stats.r(any(outliers),:)=[]
qqplot(Stats.r)
Anyone got any ideas??????

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