R help - Sep 2018 - How can I know the Hausdorff dimensions of fractals in the 'fractalcurve' function of package 'pracma'?

> Dear Dr. Hans W. Borchers,
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> I'm using your 'pracma' package. It is very useful. May I have
a small
> question for the 'fractalcurve' function? How can I know the
Hausdorff
> dimension for every option below?
> c("hilbert", "sierpinski", "snowflake",
"dragon", "triangle",
>    "arrowhead", "flowsnake", "molecule")
> For the "dragon" option, its Hausdorff dimension is log(4)/log(2)
= 2.
> For the others, what are the Hausdorff dimensions?
I don't know. Have you tried the *fractaldim* package to find at least a
plausible numerical value for the Hausdorff dimension?
> I have found the list of some fractals by Hausforff dimensions.
> I don't know which in the above option corresponds to which in
Wikepedia.
Guess you mean the "List of fractals by Hausdorff dimension". Well,
"hilbert"
is obviously the Hilbert curve and has a Hausdorff dimension of 2 -- because
it is a 'space-filling' curve.[^1]

Otherwise, use `fractalcurve()` to generate plots of the fractal curves and
compare with the pictures shown on the Wikipedia page. Not all the
curves may be present on this list, though.
> Thanks a lot!
> Best wishes,
> Peijian Shi
---
[1] By the way, I doubt your estimation that the dragon curve has Hausdorff
    dimension 2; it looks more like 1.5236.