Re: 2d matrix plots 'with labels'

[sfeam <sf...@us...>]

On Wednesday, 26 July 2017 17:26:05 Dima Kogan wrote:
> sfeam <sf...@us...> writes:
> 
> > On Wednesday, 26 July 2017 14:49:07 Dima Kogan wrote:
> >>
> >> Plotting a matrix of numbers as points with varying colors works ok:
> >>
> >>     plot '-' matrix using 1:2:3 notitle with points pt 7 ps 2 palette
> >>     1 2 3
> >>     4 5 6
> >>     e
> >>
> >> I get 6 points in a grid, with different colors. I would expect that
> >> plotting the same thing 'with labels' should work too, but with printed
> >> text instead of points
> >>
> >>     plot '-' matrix using 1:2:3 notitle with labels
> >>     1 2 3
> >>     4 5 6
> >>     e
> >>
> >> I get the grid of printed text, but each "point" is "6" and not "1",
> >> "2", ...
> >>
> >> Bug?
> >
> > "with labels" wants a string, not a number.
> > This should work:
> >
> >   plot '-' matrix using 1:2:(sprintf("%d",column(3))) with labels
> >
> > I have no idea why it prints "6" though.  That's a mystery.
> 
> Hmmm. I can replace the 1,2,3 thing with aaa,bbb,ccc, and it still
> prints the last one. 

There is no provision for a matrix to hold anything but floating point
numbers, so I would not expect anything useful from trying to fill
one with aaa bbb ccc etc.  (Unless maybe it interprets them as
hexidecimal constants?)

> And this works ok for non-matrix plots,

Sure.  The limitation arises specifically from what can be read in as a matrix.

> so it sounds like a misbehavior to me. 

Well, if you could store strings in the matrix then yes "with labels" should
print them.  But so for you are limited to floats.
Do you see a need to read in a matrix of strings?

	Ethan