On Wed, May 6, 2020 at 6:43 PM Paul A. Rubin <parubi...@gmail.com> wrote: > > I suspect that I have found a bug: When I do what I do at the attached > screenshot, I do not get what one would have expected (the vertical > line drawn between the first and the second column). > > This discussion may be relevant: > > https://tex.stackexchange.com/questions/299221/adding-vertical-line-equal-sign-to-augmented-bmatrix-without-using-array > > What version of LyX are you using? I get the vertical line using LyX 2.3.4.2 > on Linux Mint. > > Thanks, Paul. I am using > > LyX Version 2.3.4.2 > > on Fedora Linux 31. > > Have you selected the matrix decoration as [x], Paul? > > As soon as one does that, LyX uses bmatrix environment, with which it > is impossible to get an augmented matrix. > > Sorry, missed that part. You're right, that does nuke the vertical line. > A workaround is to use the [] math toolbar button to create the brackets > and insert the matrix inside. It's not perfect -- there seems to be more > white space between brackets and matrix -- but it's in the ballpark. > > No, Paul. There is a better approach: The one presented at the > web-address I mention on my initial message: In the horizontal > alignment, insert: > > @{}c|c@{} > > and select no matrix decoration. Then enter the brackets as you > suggested. You will see that the extra white space between brackets > and matrix will be gone. > > I would suggest that LyX implements this approach: Augmented matrices > are shown very nicely and neatly. > > You should submit a ticket for this. I did a little experimenting and > discovered that if you do exactly what you were doing in the screenshot > except make any one column left or right justified rather than centered, LyX > nests an array inside a bmatrix. With all centering, LyX just uses a bmatrix > and drops the contents of the horizontal alignment field. (I did not > experiment with vertical alignments.) So unless there is a reason not to do > so, the answer might simply be to nest an array inside a bmatrix in all cases. > > The fact that LyX is deviating from its usual behavior in this one case has > me wondering whether the exception was created deliberately, to accommodate > some other use case.
Thanks, Paul. I have meanwhile submitted a ticket for this: https://www.lyx.org/trac/ticket/11854 Paul -- lyx-users mailing list lyx-users@lists.lyx.org http://lists.lyx.org/mailman/listinfo/lyx-users
