Thu, 7 Aug 1997 16:42:21 +1200 (NZST)
Here is a proposal:
At present when you specify a color with an integer it is taken as an
index into a fixed table of 8 colors.
1=red, 2=green, 3=blue, 4=cyan,
5=magenta, 6=yellow, 7=white, 8=black
[At least this is the intention, there may be bugs in the
implementation]. Since I am looking at this anyway (to see if I can
see the bug that Martin and Kurt have mentioned) I thought I might
make a larger change.
I would like to make the color table, user definable. To do this
there needs to be a function
where "name" could be used to select one on a number of standard
built-in palettes (e.g. "default", "heat", "terrain", "pastels" etc)
and (if name was not specified, "value" could be a character vector of
color specifications (of length less than or equal to 256?). Either
names (e.g. "red", "lightblue" ...) or by rgb values (e.g "#FF00FF")
could be used in the vector.
The function palette would return the previous palette, and
could be used to obtain the current settings without a change.
After a call to palette integer col= specification would provide
indexes into this table.
col=0 could be used to indicate the current background color.
The "default" palette would have 1=black.
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