Re: 'help matrix' -- Re: [Bug #1264105] In currrent CVS version plotting matrix is broken

[<mi...@ph...>]

> I'm still confused by the documentation, and will try to
> clarify it. For example, you suggest
>
>> X- and y-indices of the matrix correspond to column and row index of the
>
> But this is not really correct, as the use of "plot <foo> matrix"
> demonstrates.  "Column 3" may or may not be a Z value, depending
> on what kind of graph you are describing.

I would keep the x, y and z for both plot and splot cases, and add that
the default using for plot is
    plot 'a.dat' matrix using 1:3
and not using 1:2 which makes no good sense for matrices.

>   Matrix values are read in a row at a time, i. e.,
>           M11 M12 M13 M14 ...   (i=1)
>           M21 M22 M23 M24 ...   (i=2)
>           M31 M32 M33 M34 ...   (i=3)
>           ... ... ... ... Mij
>
>   The interpretation of columns in the "using" specification for
>   matrix data is different from the usual case. "$1" refers to the
>   matrix row index i, "$2" refers to the matrix column index j,
>   and "$3" refers to the matrix entry Mij.

Indexing starts from 0. Further, x is the column index j, y is row index i.

> Does this description seem OK to you?

Please combine it with my longer description with example for both 'help
matrix' and 'help matrix ascii'.

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PM