x and y axes use different units in plots, resulting in distortion

[szhorvat]

It seems to me that in R, plots of graphs look distorted as the x and y axes seem use different units. Example

plot(make_lattice(c(2,3)))

Compare this in Mathematica:

Both sides of the grid should look like a square, not like a squished rectangle. I get what R shows me when forcing the bounding box to a square, at the cost of using different units along the x and y axes.

@schochastics @maelle Do you think this could be fixed? What's the standard approach in R? For graph plots, the units should really be the same, otherwise a rotated rectangle doesn't even look like a rectangle, but a parallelogram:

The original coordinates returned from the C core do form a rectangle.

[schochastics]

Without checking, could this be related with #1492? In any case, I will address this together with that issue

[szhorvat]

Yes, I think it's the same. I can't find where the code does this though. The C core doesn't do it. ChatGPT told me that asp=1 should use the same units, but that doesn't fix this issue, and I couldn't tell if ChatGPT gave bad advice or there's some internal coordinate normalization. It seems that there is.

[schochastics]

I am quite confident that I know where to fix this. I will address it this week