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06-24-2015 03:43 AM

Hi! I have a question: how can i 'translate' this RStudio command

> fm9.1<-gls(visual~-1+visual0+time.f+treat.f:time.f, weights=varIdent(form=~1|time.f),data=armd)

> summary(fm9.1)

in SAS code?

I can't solve this problem. Thanks for your help!

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06-24-2015
08:44 AM

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06-24-2015 08:44 AM

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06-24-2015
08:44 AM

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06-24-2015 08:44 AM

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06-24-2015 08:53 AM

Hi,

With regards to the Linear Modelling GLS procedure, you can have a look at:

http://support.sas.com/documentation/cdl/en/statugregression/61752/PDF/default/statugregression.pdf

Or post directly into the statistics section on here about Linear Models.

With regards to the summary command, there is proc summary, proc means, proc freq. All have help pages on line. Should be mainly putting your variables in the correct order.

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06-24-2015 09:21 AM

Thanks! But my problem is that hat i want to do a linear regression with heterogeneus variance, because my 'w_i' is not equal 1 but is equal to the variance of the first level of a model's factor. How can i write this?

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06-24-2015 10:14 AM

I would suggest posting in the Statistical Procedures section of this help with your question, I am not a statistician sorry.

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06-24-2015 10:22 AM

You mean Weighted Least Square ? Post it at Stat Forum. I guess proc glm can do that.

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06-24-2015 10:32 AM

Yes, i mean that! Ok i try there. Thank you all