Formulas can now refer to fields and regions in other tables, be it in
the same file or even in different files.
This also opens the door for more interesting R support, because
arbitrary tables in a file can now be accessed with appropriate
commands.
Finally, this commit also introduces a convenience for creating
references in tables. For the purpose of references, it will always
be *assumed* that there is another hline at the end if each table. So
for example in a table that has only a single hline, to separate
header from data, you can now access all of column two with
"@I$2..@II$2".
In a recent patch we have introduced names for all fields in the last
row. This has lead to a bug, that Org thinks there might be a field
formula associated with those fields. Now we check if there really is
one, and only in this case ask to overwrite it with a column formula.
Report by Henry Atting.
After the failed implementation of `@0' as a reference for the last
line, this is a second attempt to provide such references. I would
have liked to allow `@last' as the reference, that would have been
beautiful. However, too many regular expressions directly search for
`@' followed by a number, so this is too hard to implement.
Therefore, I am now turning the last row into a row of implicitly
named fields. From now on, $LR1, $LR2,... can be used to refer to
fields in the last row. These names may also appear on the left hand
side of formulas.
Exporting tables to LaTeX suffered from the problem that Org tables
are often long, but that the tabular environment in LaTeX cannot
handle long tables. This patch fixes this issue.
LaTeX export can now deal with very long tables, by setting an option
in the "ATTR_LaTeX:" line. Also, you can specify the alignment by
hand. Here is an example:
Also, table export now correctly deals with tables that start with a
hline. In such a case, also the LaTeX version will have this extra
hline before the first line.
The last data line in a table is often a line with important data, for
example sums of a column. In tables with varying length, the row
number of this line is constantly changing, which makes it hard to
write programs creating tables and then installing formulas.
This patch introduces @0 as a special reference to the last row, so
that @0$3 would be the field in the last row, 3rd column.
Tassilo Horn asked for this, because he finds the default behavior of
silently choosing a different row too confusing. I actually do agree.
The main use of this feature was running averages, if you need this
feature, you can customize the variable
`org-table-error-on-row-ref-crossing-hline'.
Carsten Dominik
Bernt Hansen