@Iha: Maybe a good idea.

I'd like to add that if there is no such an ability any plots with more than 20
points cannot be distinguished on black-and-white prints as no symbols can be
used and no color is seen.

I am not quite sure what you mean with symbol frequency. Would you like to have
an option that makes only each nth  point to be displayed?

Yes, it's exactly what I mean. Currently OO with new chart uses symbols to mark
points if user chooses "points" or "points with line" chart subtype. It is
displayed as "icon" when user chooses "object properties" after selecting data
series from chart plot.

Plotting applications I used before allowed adjusting the frequency of symbol
(here "icon") displaying. So if there are more than one data series per plot and
they consist from a lot of points user can choose points and line and adjust
points frequency for better plot perception.

Also there was a mechanism there for series selection. Currently a data series
can only be selected with a mouse on the plot to adjust its visual
representation. If there are 5, 10, 15... data series it would be rather hard to
 select them with a mouse. Golden Software Grapher used a Ctrl modifier to
select consequently data series which graphs lie one under another. Or it could
be done via a list in a tree. So OO needs an access from its list of series to
their visual representation.

The problem with displaying only every n'th data point is that the result can
give a wrong impression - for example when outliers are skipped or you hit a
sample frequency. I am not sure whether this option might bring some users into
trouble. Hm.

I rate this feature to be too dangerous. So I won't implement it.

So the alternative is to display all say 2048 points just from one column. How
much processor power and memory it would require? 
Well known commercial applications like Grapher have such an ability and they
are not afraid a user would not see some peak. It is up to a user, to use this
feature or not. And user can check it by disabling/enabling the option and
looking at the graph or it even can be checked automatically when the data is
changed or the chart is to be drawn for the first time.
If OO performance would not suffer from displaying such amount of data, this
issue is obsolete. If no, I would like to see any solution to this problem.

Since OOo 2.3 the chart does not create shapes when a data point for a given
resolution is on the same pixel as its predecessor. Thus only the necessary
points will be created.
It is no problem to create a chart with 2084 points from one column when the
data have any trend. Please give it a try.
When there are still performance problems I'd rather invest my time there
instead of implementing workarounds.
So again, I won't fix this feature.

close the invalid issue