Hi Max and Rik

> On Oct 12, 2022, at 4:49 PM, Max Chernoff <mse...@telus.net> wrote:
> This new output looks *much* better than the old one, thanks! 

Thank you!

> My only comment is that the spacing around the multiplication sign looks
> a little too tight to me. The original spacing was probably too large,
> but I think that a little more space than you currently have would be
> better.

I haven’t adjusted the space directly. I just changed the \times and \cdot from 
class binom to class ord. I’m not going to tweak the space. I don’t even use 
this font. With proportional numbers in Libertinus, I think the \times looks 

Attachment: PastedGraphic-5.pdf
Description: Adobe PDF document

With tabular numbers, the \times looks a bit off center due to the extra space 
around the following 1.

>> If anyone wants my changes, either for their own use or to improve the
>> distributed phys-dim.mkxl, I’m happy to share.
> Yes, can you please share that to the list?

See below for comments, and the full modified phys-dim.mkxl is attached

> Hi Rik,
>> It does look like you have introduced additional space before the 
>> solidus. Was that intentional?
> I believe that that is intentional. From the earlier email:
>> removed an overzealous backspace before division symbols.
> This new spacing looks much more even to me, especially around the
> exponents.

It was intentional. I didn’t add space. I removed a backspace in the \unit code.

Below I list all of my changes to the phys-dim.mkxl code, with some commentary. 
I have added comments in the code everywhere I made a change, and I signed the 
changes with -GP, so they are easy to find.

Thanks for your encouragement, because my high school physics students 
certainly do not give a s#!t.

I hope some people find this useful!


This used to add space around the \times in text. Now, instead, it removes the 
space around the \times in math by making the \times an ord. (ll. 170-172)

\permanent\protected\def\digitstextbinop#1% assumes preceding
  {\ifmmode\mathord#1\else\nobreak#1\fi} % Removed space around binop (\times 
or \cdot) in \units -GP
  %{\ifmmode#1\else\fourperemspace\nobreak#1\fourperemspace\fi} % This is the 
old line with spaces -GP

These lines produce the \cdot between units, one is for the default \cdot, the 
other when the separator=cdot option is used. I’m not entirely sure why they 
are separate. Now, in math mode, the \cdot is changed to an ord. (ll. 392-393

 % Made \cdot an "ord" in math mode -GP

\installunitsseparator\v!normal{\ifmmode\mathord\cdot\else\cdot\fi}  % Made 
\cdot an "ord" in math mode -GP

To get the thin space between the number and the units (ll.412-418)

     \thinspace % let the atoms do the work. Right now atoms aren't doing the 
work, so I put in a \thinspace -GP
     \unskip % weird, why is unskip needed

This had a hardcoded backspace before the solidus. I think it looks better 
without. Even if this space should be tighter, it probably should be dealt with 
for every solidus, not just the solidus in \unit the unit command. (ll.412-418)

  {%\ifnum\c_phys_units_state=\plusone % suffix  % Removed three lines to 
eliminate backspace before / -GP
   %  \unitsbackspace

Finally, until the space around the dimension class is fixed, I’m just removing 
the code that sets units to this class. (ll. 618-623)

%     \mathatom % I removed this because the correct spaces after dim haven't 
been set (e.g. dimbin, dimrel) -GP
%        \s!leftclass  \mathdimensioncode
%        \s!rightclass \mathdimensioncode

Attachment: phys-dim.mkxl
Description: Binary data

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