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Editorial Team
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Asked: 2026-05-28T16:53:45+00:00

How would I convert a column of R formulas to include the data frame

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How would I convert a column of R formulas to include the data frame specification? For example I have a column of hundreds of formulas, but they don’t contain any data frame spec, such as:

365/(x/y)
365/(x/(y + z))
365/(x/ (y - z))
c + d + e + f

and I would like to convert the whole column to look like:

365/(r$x/r$y)
365/(r$x/(r$y + r$z))
365/(r$x/ (r$y - r$z))
r$c + r$d + r$e + r$f

so I basically want to add a prefix(r$) to each text group separated by operators. is this possible to do in R?

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1 Answer

  1. Editorial Team

    A much better approach is to supply the data frame directly as e.g.

    lm(y ~ x, data=myframe)

    as many modelling function support a data= argument.

    Alternatively, you can use the with and within functions

    with(myframe, summary( 365/(x/y) ) )

    which provide access to the components of the data frame myframe without requiring the prefix.

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