ses: More on cell printing
4.5 More on cell printing
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Special cell values:
• nil prints the same as "", but allows previous cell to spill over.
• ’*skip* replaces nil when the previous cell actually does spill
over; nothing is printed for it.
• ’*error* indicates that the formula signaled an error instead of
producing a value: the print cell is filled with hash marks (#).
If the result from the printer function is too wide for the cell and
the following cell is ‘nil’, the result will spill over into the
following cell. Very wide results can spill over several cells. If the
result is too wide for the available space (up to the end of the row or
the next non-‘nil’ cell), the result is truncated if the cell’s value is
a string, or replaced with hash marks otherwise.
SES could get confused by printer results that contain newlines or
tabs, so these are replaced with question marks.
‘t’
Confine a cell to its own column (‘ses-truncate-cell’). This
allows you to move point to a rightward cell that would otherwise
be covered by a spill-over. If you don’t change the rightward
cell, the confined cell will spill over again the next time it is
reprinted.
‘c’
When applied to a single cell, this command displays in the echo
area any formula error or printer error that occurred during
recalculation/reprinting (‘ses-recalculate-cell’). You can use
this to undo the effect of ‘t’.
When a printer function signals an error, the fallback printer ‘"%s"’
is substituted. This is useful when your column printer is numeric-only
and you use a string as a cell value. Note that the standard default
printer is “%.7g” which is numeric-only, so cells that are empty of
contain strings will use the fallback printer. ‘c’ on such cells will
display “Format specifier doesn’t match argument type”.