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3 results for “from:Yan Wu”

measure of goodness of fit for the model without an intercept
Yan Wu · Jan 29, 2015 · r-help

Hi, When I fit the regression model without an intercept term, R-squared tends to much larger than the R-squared in the model with an intercept. So in this case, what?s a more reasonable measure of the goodness...

How to decide " weight" in WLS model in R ?
Yan Wu · Mar 2, 2015 · r-help

Hi, I would like to know how to decide the "weight" in a WLS model in R? For example, In the" pipeline " data from faraway, I try to fit a regression model Lab ~ Field (non-constant variance). I wish to...

Help with a for complex for loop that looks into another data frame
Yan Wu · Nov 7, 2014 · r-help

Hello everyone! I am working on a stock trading algorithm. I have created a data frame with the stocks, and a summary data frame, master_df_ex, and master_df_ex_sum, respectively. The goal is to create something each...

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