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Re: st: graph combine
With regard to -grc1leg-, Kit Baum <firstname.lastname@example.org> asks,
> [...] Now we can bug Vince: why isn't this handy feature available
> in - graph combine-? Seems to be an obvious thing to do in a set of
> graphs with common legends.
As I noted in 2003 when -grc1leg- was first posted, we don't want to overload
the syntax of -graph combine- with more options. The syntax seems daunting
enough as is.
-graph combine-, moreover, is built to combine existing graphs, like one might
arrange pictures on a wall. It does not reach into those graphs and pluck
pieces from within the graphs to create something more akin to a Picasso.
-grc1leg- has a certain hint of danger that we would not like to see in the
official graph combiner. What if the graphs don't have a common legend? Will
we make something that could deceive the reader?
A completely different, and official option, is to rearrange your data so that
each graph's data is stacked in the dataset with a categorical identifier for
each graph. With the data arranged this way the -by(graphid)- option of
-graph- will array a set of graphs, one for each value of graphid, with a
common legend. No need to worry that the graphs might have different legends;
they were created with the same command.
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