TidierData.jl ― Apply transform across columns while retaining access to other variables in the row

[jules]

@lunafazio

@chain df begin
    tmp = _
    @mutate(across(startswith("β"), x -> tmp.τ*x))
end

You can use _ multiple times, then you just have to assign the first argument, too:

@chain df begin
    @mutate(_, across(startswith("β"), x -> _.τ*x))
end