Re: plot very slow in 2.9.12

[Tatsuro MATSUOKA]

Dear Philipp Zehnder and David Bateman 

First, did you tried 

x=[0:pi/10:2*pi]; plot(x,sin(x)); drawnow;

?

>From the propmt, it is usually no use for using drawnow.

Second, from Octave 2.9.12, the plot seems to be  carried
out
by sending data from pipe

gnuplot> plot '-'
input data ('e' ends) > 1 2
input data ('e' ends) > 2 3
input data ('e' ends) > e

For Octave 2.1.xx, the plot was carried out using
temporary files.

The pipe line speed is essential for Octave 2.9.12.

Philipp said that the pipe line problem was for only
windows user.
I do not think so.
 
http://sourceforge.net/tracker/index.php?func=detail&aid=1673352&group_id=2055&atid=102055


I think the problem of the above url is also the case for
posix like system users.

Yesterday I have built a gnuplot 4.3 (cvs version) on
cygwin, in which the pipe line patch was already used.

I did not measure the speed qunatatively but it seemed
faster than that when I have been using gnuplot 4.2.

The test was carried out the following the script.

http://lecture.media.nagoya-u.ac.jp/course/h071088/ComputerAlgorithm07/ScriptsEtc/exdiff.m
  

Sincerely

T. Matsuoka

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