When R diagnostics is on in RStudio ("Check arguments to function call" is checked), powerCurve() produces a warning for missing arguments, which lack defaults.
Thanks for the heads up. I'd call this a false positive, looks like RStudio is being a bit overambitious in its diagnostics. I'll keep the issue open though in case I can think of a workaround.
When R diagnostics is on in RStudio ("Check arguments to function call" is checked),
powerCurve()
produces a warning for missing arguments, which lack defaults.