On Wed, 2013-10-30 at 00:00 +0100, Benoît Minisini wrote: > Le 29/10/2013 23:12, Tobias Boege a écrit : > > On Fri, 25 Oct 2013, Beno?t Minisini wrote: > >> Le 24/10/2013 15:08, Tobias Boege a ?crit : > >>> My workaround always was like this: > >>> > >>> ' Create the read pipe special file > >>> hGPstdout = Pipe "/tmp/gnuplotFIFO2" For Write > >>> Close #hGPstdout > >>> ' Create write end > >>> hGPpipe = Pipe "/tmp/gnuplotFIFO1" For Write > >>> ' Start writer > >>> hGPproc = Shell "gnuplot </tmp/gnuplotFIFO1 >/tmp/gnuplotFIFO2" > >>> ' Really create read end > >>> hGPstdout = Pipe "/tmp/gnuplotFIFO2" For Read Watch > >>> > >>> Note that since the shell which starts hGPproc already opened > >>> /tmp/gnuplotFIFO2, you won't have any deadlock problems when opening > >>> hGPstdout For Read afterwards. > >>> > >>> Anyway, if I > >>> > >>> Print #hGPpipe, "plot x^2" > >>> > >>> only garbage (not non-sense but the string is always scrambled) seems to > >>> arrive at gnuplot. Also, I seem to get output from gnuplot irregularly. So > >>> I'm out of options for now. I remember that raising Read events for > >>> streams > >>> has been subject to issues from time to time... > >>> > >>> Regards, > >>> Tobi > >>> > >> > >> Please give details. I tried what you said (but "plot x*x" because" > >> "plot x^2" seems to not be the good syntax), and I always got the plot > >> as expected. > >> > > > > OK. The attached project gives the following output after I pressed > > "Button1" four or five times: > > > > --- > > Read line 0: non-integer passed to boolean operator > > > > > > Read > > gnuplot> lot x^1 > > ^ > > line 0: invalid command > > > > > > Read > > gnuplot> pot x^1 > > ^ > > line 0: > > Read invalid command > > > > > > Read > > gnuplot> lotx^1 > > ^ > > line 0: invalid command > > > > > > Read > > gnuplot> plp plot x^1 > > ^ > > > > Read line 0: invalid command > > > > > > > > --- > > > > You can see that in each message, one character is missing so that "plot" is > > "lot" or "pot" or "lot" again. The missing characters "plp" appear in the > > last message, totally mis-placed. > > > > Am I maybe reading incorrectly from the pipe? > > > > Regards, > > Tobi > > > > Spoke too fast. Now I have the same output as you (more or less)... >
OK, I have made a few changes to plotdoc (attached). This version makes a plot and lets us interact with it. Notes: 1) sending the "show all" command gets us lots of text back from gnuplot and it all appears to be contained within my "Read [" and "] ..done" tags. So it looks as though we are getting (stdout) text back properly. 2) one thing I have found with gnuplot is that you must tell it to quit or you end up with zombie tasks. (In fact this was the main reason I started using pipes.) 3) when you run this plotdoc put the mouse over the plot window and try [Shift]+[Ctrl]+[mouse wheel] - Now we see the "junk" appearing. But it is all inside "Read [", "] ..done" pairs, so it looks as though gnuplot either sends the errors back through stdout or that we are already getting stderr inside the pipe. 4) if you just run gnuplot within a terminal, plot sin(x) and use the mousewheel there is no junk output. Maybe its gnuplot that has got a problem when it is run from some other task??? -- Bruce <bbr...@paddys-hill.net> Paddys-Hill dot net
gnuplotter-0.0.1.tar.gz
Description: application/compressed-tar
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