Re: plot matrix?

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

On Saturday 21 November 2009 07:54:55 pm you wrote:
> On Saturday 21 November 2009, Philipp K. Janert wrote:
> > I am not sure how the "matrix" keyword works
> > (that is: is supposed to work) when used together
> > with the plot (not splot) command.
>
> I share your confusion.

	;-)

> >
> > 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.
>
> It is clearly useful to have such a capability.
> I use it to make heat maps, for instance.
> See heatmaps.dem

But that just goes to my point: the examples in 
heatmaps.dem all use splot (not plot), except
for one that uses "with image", which I think is
for a binary file (not ascii).

I still can't see any "proper" use for an ASCII
matrix with plot (not splot).

> But whether I use it in the way orginally intended is another
> question :-)
>
>
> Another bizarre property is that the following command can be
> used to plot the values in a row of data rather than a column
> of data, which is otherwise "impossible" in a normal gnuplot command:
>
>      plot 'rowdata' matrix using 1:0
>
> I suspect this was totally unintended.  At one point I tried
> to figure out if this was generalizable, but I got too confused
> and gave it up.

I admit, that is cute.