plot matrix?

[Philipp K. J. <ja...@ie...>]

I am not sure how the "matrix" keyword works
(that is: is supposed to work) when used together
with the plot (not splot) command.

Can you help me to enumerate the legal uses?

For splot, there seem to be two legal ways to use
matrix:

	splot "file" matrix 
and
	splot "file" matrix u ($1):($2):3

The first assumes the values in the file to be z-values
on a regular grid.

The second assumes that the z-values are in "column"
3, and allows me to fix the x- and y-coordinates through
the "columns" 1 and 2.

Is it legal to do either:

	splot "file" matrix u 1
or
	splot "file" matrix 1:2

And if so, what do either of them do?

For plot (not splot), I am completely confused. Does
it even make sense to have the notion of a "matrix"
format for plot? The "matrix" keyword seems to suggest
that the data is on a regular, 2-dim grid. This notion 
does not seem to have any meaning for plot.

Best,

		Ph.