bug#40155: 27.0.90; `math-truc' called with `nil' during `calc-graph-fast' call

[Mattias Engdegård]

27 mars 2020 kl. 21.54 skrev Narendra Joshi <narendraj9@gmail.com>:

> Thanks for the explanation. The patch fixes the original issue and
> other calculations I tried didn't seem to be affected.

Much appreciated -- pushed to emacs-27.

> I found out that `calc` doesn't set the LineStyles (and maybe
> PointStyles as well but I am not sure how to hand those over to
> gnuplot command) properly for the gnuplot command. I think it should
> do something similar to the patch I have attached.

Thank you, but I'm not sure if it's quite that easy. The function 
(calc-graph-set-styles) seems to parse a plot command in order to modify it. 
Has this code never worked, or is it just Gnuplot's syntax that has changed?

In any case, I'm closing this bug since the math-trunc error is fixed. You can 
open a separate bug for the LineStyles and PointStyles problems, and describe 
what it's all about.