By default, pgfplotstable breaks lines at white space (tab or space according to the pgfplotstable manual). I used tabs as column separators in my demo file. With MKiV, the columns are correctly split but with LMTX, pgfplotstable sees a single column.
I explicitly stated that the columns are separated with tabs:
\addplot table [x=t, y=E, col sep=tab] {mfe-addplot.dat};
and it works. I tried to change the columns separator to a space, instead of a tab and it also works.
I don't know what pgfplotstable uses to split columns, but the conclusion is that with MkIV 'col sep=space' means space or tab, whereas with LMTX it means strictly a space character.
Thank you very much for your help. I think I have it running now but you have to wait for an update (one of
On 12/12/2020 3:35 PM, Jean-Philippe Rey wrote: those curious border cases where tex bends a rule by turning tabs into spaces (the alternative is to let the tab token flagged as spacer travel around which would permits round trip). Makes me wonder I should have that as option in luametatex (but as I'm now in metapost mode I delay that pondering.) Hans ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl -----------------------------------------------------------------