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Re: Re: ListPlot with missing values

  • To: mathgroup at smc.vnet.net
  • Subject: [mg22445] Re: [mg22419] Re: ListPlot with missing values
  • From: steffenz at server2.fo.FH-Koeln.DE
  • Date: Sat, 4 Mar 2000 02:26:21 -0500 (EST)
  • Sender: owner-wri-mathgroup at wolfram.com

> Date:          Wed, 1 Mar 2000 00:40:15 -0500 (EST)
> From:          Roy Mendelssohn <rmendels at pfeg.noaa.gov>
To: mathgroup at smc.vnet.net
> To:            mathgroup at smc.vnet.net
> Subject: [mg22445]       [mg22419] Re: ListPlot with missing values

> First, thanks to all who answered.  I clearly didn't explain the problem
> carefully enough.  Assume we are plotting a time series with missing
> data, and only want to conect consecutive points that have data, have
> blanks whenever a time point is missing, and still want points lined up
> correctly in time on the x axis.  If I just delete cases, then the
> endpoints of any missing segment will be connected, rather than being
> blank.
> 
> In the example
> 
> alist = {{1, 1}, {2, 3}, {3,5},{4,}, {5, 6}, {6,8},{7,}, {8,10},{9, 12}}
> 
> I want a line joing the first three points, then a blank, then a line
> connecting the next two points, then a blank etc.
> 
> The reason I mentioned the number of datapoints is because one solution
> is to draw a graph for each uninterrupted segment of the time series,
> and then overlay them.  This seems inelegant,because several hundred
> separate graphs might have to be drawn.
> 
> If anyone else has other suggestions I would welcome them.
> 
> -Roy M.
> 
> 
> 
Hi Roy!

ListPlot[alist, PlotJoined -> True]
was giving me this 3 lines divided with blanks.
(I'm using Mathematica 4 on Win NT)

bye

Steffen

Dipl.-Ing. Steffen Zozgornik

Institut fur Licht- und Bautechnik
an der Fachhochschule Koln
Gremberger Strasse 151 a
D - 51105 Koln

Tel.: +49 - 221 - 83 10 95 
Fax.: +49 - 221 - 83 55 13 


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