search for: tp4640822p4640900

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2012 Aug 20
2
Unable to reference variable created in dataframe
Hello, I have question about referencing a variable that I created in a dataframe, and I am hoping the experts on here can be of assistance. I have a dataset of highway bridges with approximately 10,000 observations. I imported these into R in the form of a dataframe called "Bridges". I am interested in running some basic linear models on a few key variables with the data. Say