Re: st: generating one twoway graph using by

[Nick Winter <nw53@cornell.edu>]

Nick Cox suggested three good, more-or-less pre-packaged solutions.

Another way to go, which generalizes to other cases where one needs to 
generate multiple graph statements, might be something like this:

  levels PID , local(levs)
  foreach val of local levs {
    local cmd `cmd' (line ivalue idate if PID==`val')
  }
  graph twoway `cmd' , legend(off)

This builds up your (massive) list of graph commands in a loop, then 
executes them all at the end.

I'm not sure that plotting all 200 in one graph will generate anything 
comprehensible, but it can be done . . .

--Nick Winter



At 10:27 AM 9/24/2004 -0400, you wrote:

> Hello all,
>
> I am trying to make a line plot of many individuals values over time
> in one graph. I am hoping that there is someway to shortcut around the
> syntax of -twoway- using -by- such that I do not need to specify all
> individuals (I have nearly 200).
>
> I started with
> twoway (line ivalue idate, by(PID))
> but that gave 200 individual graphs.
>
> so did
> twoway (line ivalue idate), by(PID)
> but that gave the same thing.
>
>
> I am hoping to avoid needing to write
> twoway (line ivalue idate if PID==1) (line ivalue idate if PID==2) ......
>
> Should I stop hopeing, and start writing?
>
> Thanks in Advance,
>
> Dan Egan
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