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The Org Mode 7 Reference Manual
by Carsten Dominik and others
Paperback (6"x9"), 282 pages
ISBN 9781906966089
RRP £9.95 ($14.95)

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15.6 Editing and debugging formulas

You can edit individual formulas in the minibuffer or directly in the field. Org can also prepare a special buffer with all active formulas of a table. When offering a formula for editing, Org converts references to the standard format (like B3 or D&) if possible. If you prefer to only work with the internal format (like @3$2 or $4), configure the variable org-table-use-standard-references.

C-c =
C-u C-c =
Edit the formula associated with the current column/field in the minibuffer. See section 15.5 Column formulas, and section 15.4 Field formulas.
C-u C-u C-c =
Re-insert the active formula (either a field formula, or a column formula) into the current field, so that you can edit it directly in the field. The advantage over editing in the minibuffer is that you can use the command C-c ?.
C-c ?
While editing a formula in a table field, highlight the field(s) referenced by the reference at the cursor position in the formula.
C-c }
Toggle the display of row and column numbers for a table, using overlays. These are updated each time the table is aligned; you can force it with C-c C-c.
C-c {
Toggle the formula debugger on and off. See below.
C-c '
Edit all formulas for the current table in a special buffer, where the formulas will be displayed one per line. If the current field has an active formula, the cursor in the formula editor will mark it. While inside the special buffer, Org will automatically highlight any field or range reference at the cursor position. You may edit, remove and add formulas, and use the following commands:
C-c C-c
C-x C-s
Exit the formula editor and store the modified formulas. With C-u prefix, also apply the new formulas to the entire table.
C-c C-q
Exit the formula editor without installing changes.
C-c C-r
Toggle all references in the formula editor between standard (like B3) and internal (like @3$2).
TAB
Pretty-print or indent Lisp formula at point. When in a line containing a Lisp formula, format the formula according to Emacs Lisp rules. Another TAB collapses the formula back again. In the open formula, TAB re-indents just like in Emacs Lisp mode.
M-TAB
Complete Lisp symbols, just like in Emacs Lisp mode.
S-up/down/left/right
Shift the reference at point. For example, if the reference is B3 and you press S-right, it will become C3. This also works for relative references and for hline references.
M-S-up/down
Move the test line for column formulas in the Org buffer up and down.
M-up/down
Scroll the window displaying the table.
C-c }
Turn the coordinate grid in the table on and off.

Making a table field blank does not remove the formula associated with the field, because that is stored in a different line (the ‘#+TBLFM’ line)---during the next recalculation the field will be filled again. To remove a formula from a field, you have to give an empty reply when prompted for the formula, or to edit the ‘#+TBLFM’ line.

You may edit the ‘#+TBLFM’ directly and re-apply the changed equations with C-c C-c in that line or with the normal recalculation commands in the table.

Debugging formulas

When the evaluation of a formula leads to an error, the field content becomes the string ‘#ERROR’. If you would like see what is going on during variable substitution and calculation in order to find a bug, turn on formula debugging in the Tbl menu and repeat the calculation, for example by pressing C-u C-u C-c = RET in a field. Detailed information will be displayed.

ISBN 9781906966089The Org Mode 7 Reference ManualSee the print edition