You desperately need to study your reference material more carefully or talk to your instructor... h109 is clearly something part of midterm_df and not an object on its own in your working environment. Also, read the help for sample.default and sample.lm... they work with different arguments when the first argument is a different kind of object.
I don't expect the latter point to be obvious at first, but I am also not really supposed go into more detail... do please read the Posting Guide mentioned at the bottom of every message on this email list... there is a warning that this list does not permit answering homework because there is no way for us invisible remote people to know what the ground rules are for an educational institution or an educator who is being paid to educate and is responsible for doing so. On October 3, 2025 4:54:42 PM PDT, R Jerome Anderson <[email protected]> wrote: >I can code summary(midterm_df$hv109) and I get the summary of variable >hv109. No problem. > >Yet when I write the code: > >summary(hv109, data = midterm_df) > >I get this error: > >Error in h(simpleError(msg, call)) : error in evaluating the argument >'object' in selecting a method for function 'summary': object 'hv109' not >found > >If I write the code summary('hv109', data = midterm_df), R treats hv109 as >if it were a character variable. It is not. > >Page 521 in Andrews *Doing Data Science in R* shows the data = [df] >command. I thought it was straightforward. Why doesn't my code work? > >Any help w/ this would be appreciated. > >-- Jerome Anderson > > [[alternative HTML version deleted]] > >______________________________________________ >[email protected] mailing list -- To UNSUBSCRIBE and more, see >https://stat.ethz.ch/mailman/listinfo/r-help >PLEASE do read the posting guide https://www.R-project.org/posting-guide.html >and provide commented, minimal, self-contained, reproducible code. -- Sent from my phone. Please excuse my brevity. ______________________________________________ [email protected] mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide https://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
