[Kst] Sparse Ascii data

[Peter Kümmel]

Is there already a way to handle sparse Ascii data
(data with missing values at some rows)?

N, Col1, Col2
1,    1,    2
2,     ,    2
3,    1,    2

The idea is to a have a plot for Col1 which
is a horizontal line at 1 which does not draw
down to zero at row 2.

Is it possible to set a "ignore this value" in the
vector, or is it the responsibility of the data source
plugin to not add a zero-value at such a entry when
reading the file?

Thanks,
Peter