Hi everybody,

First of all, congratulations to the developers for the new version.
I'm sure it will not disappoint.

I have a question concerning graph keys. When plotting different data
sets in one graph, we normally want graph keys to be as informative
and as self-contained as possible. Thus, we will name the data sets
with titles of the kind "x=0.2", "y=0.3", etc. (see
http://pyx.sourceforge.net/examples/graphs/change.html for an
example).

In many situations, however, different plots correspond to different
values of the same parameter. If we adhere to the rule that keys
should be as descriptive as possible, our get graph keys would be
something like "x=0.1", "x=0.2", "x=0.3", etc. This is introduces a
lot of redundancy. I wonder if it is possible to set a key graph
layout so that there is a "header" on top, with the name of the common
parameter, so that we don't have to specify the parameter in each data
set title. In other words, instead of having a key graph reading like
this

-- x=0.1
-- x=0.2
-- x=0.3
-- x=0.4
-- x=0.5,

I would like this

    x
-- 0.1
-- 0.2
-- 0.3
-- 0.4
-- 0.5

Of course, it is possible to do this by just playing with the vdist
and hdist keyargs of graph.key, in combination with a properly placed
graph.text. But I am looking for a more elegant solution. Do you have
any suggestion?

Thanks a lot guys,
dani

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