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Very slow plotting of large data sets under Windows

From: Stephen Glow
Subject: Very slow plotting of large data sets under Windows
Date: Mon, 18 Aug 2003 21:44:26 -0500
User-agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.4) Gecko/20030612

Hi All;

I'm running Octave 2.1.50 under Windows 2000 and have noticed that plotting any large set of data points takes a very long time (minutes). The problem seems to be that the data is written to an ASCII text file, and then gnuplot reads the data points from this file for plotting. This works fine for small data sets, but when working with large sets (say 1,000,000 points) the overhead of writing all this to disk is rather extreem.

Is there any easy work around for this problem (other then not using large data sets that is)? At a minimum it seems like the data could be saved in binary format which would save the conversion time (binary->ASCII->binary) and compress the file size by a factor of about 3:1.

Does the linux version of Octave suffer from the same problem?

Are there any better graphics programs that work with Octave and are available under Windows?

Thanks for any suggestions,


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