[R] data =

Jeff Newmiller
Sat, 04 Oct 2025 07:39:35 -0000

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 <rjerome.anderson at
gmail.com> 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]]
>
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--
Sent from my phone. Please excuse my brevity.