Paul Stansell <paulstans...@gmail.com> writes: > Hi Eric, > > There appears to be a slight bug in the way gnuplot handles blocked > data with missing entries. > > An example is provided in the org script at then end of this note. > > In the code block gnuplot_1 the use of ':missing "?"' seems to cause > the exported data file to lack the blanks lines that are essential > for the plot. The plot from this code block is incorrect. > > In gnuplot_2 ':missing' is not used, but instead 'set datafile missing > "?"' is set explicitly in the gnuplot code block. The plot from this > code block is correct. > > Surely gnuplot_1 should produce exactly the same plot as gnuplot_2. >
Hi Paul, Currently the :missing header argument for gnuplot code blocks does two things. It adds the "set datafile missing..." line to the code block body *and* it binds `*org-babel-gnuplot-missing*' to the value of the :missing header argument when the datafile is written, so empty table cells are replaced with the value of the :missing header argument. The reason you're not getting a blank line is because it is replaced with three "missing" values, in this case "? ? ?". Do you think this behavior should be changed or split between two header arguments? Thanks, > > Kind regards, > > Paul > > > Exported data file does not include blank lines. > #+name: gnuplot_1 > #+begin_src gnuplot :var d=block_data_missing :missing "?" :results silent > set ticslevel 0 > splot d index 0 u 1:2:3 w lp pt 6 ps 5, d index 1 u 1:2:3 w lp pt 6 ps 5 > #+end_src > > Exported data file includes blank lines. > #+name: gnuplot_2 > #+begin_src gnuplot :var d=block_data_missing :results silent > set datafile missing "?" > set ticslevel 0 > splot d index 0 u 1:2:3 w lp pt 6 ps 5, d index 1 u 1:2:3 w lp pt 6 ps 5 > #+end_src > > #+name: block_data_missing > | 1 | 1 | 2 | > | 1 | 2 | 5 | > | 1 | 3 | 10 | > | | | | > | 2 | 1 | 5 | > | 2 | 2 | 10 | > | 2 | 3 | 13 | > | | | | > | 3 | 1 | 10 | > | 3 | 2 | ? | > | 3 | 3 | 18 | > | | | | > | | | | > | 1 | 1 | 12 | > | 1 | 2 | 15 | > | 1 | 3 | 20 | > | | | | > | 2 | 1 | 15 | > | 2 | 2 | 18 | > | 2 | 3 | 23 | > | | | | > | 3 | 1 | ? | > | 3 | 2 | 23 | > | 3 | 3 | 28 | > > > > > -- Eric Schulte https://cs.unm.edu/~eschulte PGP: 0x614CA05D
