Re: plot matrix?

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

On Saturday 21 November 2009 07:15:43 pm Daniel J Sebald wrote:
> Hi Philipp,
>
> The interpretation of matrix can vary depending on the item being plotted.
>
> First, "matrix" by itself is a legacy keyword that is still accepted for
> backward compatibility.  It's gnuplot's matrix format, who's definition is
> given in the documentation.

Huh? What has replaced it, then? 

>
> Images are the plot elements that makes sense in a matrix format for
> "plot".  Color can be five dimensional, alpha-channel six dimensional.

But that assumes a binary file, always, doesn't it?

>
> You asked about the legality of some syntax.  The answer is maybe yes,
> maybe no.  It depends on whether it makes sense for the elements being
> plotted.  In some circumstances there are default column definitions.  It's
> still open for discussion.
>
> Dan
>
> 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.
> >
> > 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.
> >
> > -------------------------------------------------------------------------
> >----- Let Crystal Reports handle the reporting - Free Crystal Reports 2008
> > 30-Day trial. Simplify your report design, integration and deployment -
> > and focus on what you do best, core application coding. Discover what's
> > new with Crystal Reports now.  http://p.sf.net/sfu/bobj-july
> > _______________________________________________
> > gnuplot-beta mailing list
> > gnu...@li...
> > https://lists.sourceforge.net/lists/listinfo/gnuplot-beta