Menu
▾
▴
[Gnuplot-py-users] Problem using gnuplot.py from cron on cygwin under W2K
|
From: Michael T. C. <mt...@ic...> - 2003-01-07 23:08:23
|
Hello and thanks for the efforts on gnuplot.py, really a nice tool. I'm hoping you might have some insight into a problem I'm having as a relatively new python and gnuplot.py user. I've written a rather brute force script that generates png plots of various meteorological fields for posting on a web page. When I run it from the command line it functions beautifully and generates all my plots in the locations I want them. If you are curious to see the results what I'm doing you can look at: http://neige.bren.ucsb.edu/mmsa/images/weekly/default.htm & http://neige.bren.ucsb.edu/mmsa/images/daily/default.htm When I go to run the routine scheduled from a cron entry however, it chokes. The system I'm on is running W2K server and I've got cron running under cygwin which calls various scripts every hour to generate the pages I need. Other python scripts work fine in this manner, for example, the following page: http://neige.bren.ucsb.edu/mmsa/images/hourly/LatestMet.htm is automatically generated hourly from a seperate python script called from the same cron entry. So, the code (Plotmmsa.py) I'm having trouble with is: _________________________________________________________ #...bunch of prep stuff cut out for brevity... print "Read in and set various lists, starting plots. Last depth reading:" print PlatformTemp[-1:] #make sure we've got data in our lists (we do). #g = Gnuplot.Gnuplot() g = Gnuplot.Gnuplot(debug=1) #debug=1 outputs gnuplot commands to stdout g('set data style lines') #g('set data style linespoints') g('set term png color') g.title('Temperature') g.xlabel('Day of Year') g.ylabel('Degrees C') #This is line 106 which seems to be the problem: g('set output "/home/mmsa/wwwroot/mmsa/images/weekly/PlatformTemp.png"') g.plot(PlatformTemp[-700:]) #Plot the last 7 days of data. time.sleep(1) #Wait for gnuplot to do it's thing. g('set output "/home/mmsa/wwwroot/mmsa/images/daily/PlatformTemp.png"') g.plot(PlatformTemp[-96:]) #Plot the last day of data. time.sleep(1) #Wait for gnuplot to do it's thing. #...Rest of plots left out for brevity... __________________________________________________________ Output from running Plotmmsa.py at the command prompt: $ ../bin/python/Plotmmsa.py Read in and set various lists, starting plots. Last depth reading: [[7.458333333333333, 3.8610000000000002]] gnuplot> set data style lines gnuplot> set term png color gnuplot> set title "Temperature" gnuplot> set xlabel "Day of Year" gnuplot> set ylabel "Degrees C" gnuplot> set output "/home/mmsa/wwwroot/mmsa/images/weekly/PlatformTemp.png" gnuplot> plot '/cygdrive/c/WINNT/TEMP/@1648.0' notitle gnuplot> set output "/home/mmsa/wwwroot/mmsa/images/daily/PlatformTemp.png" gnuplot> plot '/cygdrive/c/WINNT/TEMP/@1648.1' notitle __________________________________________________________ Output from cron running the same program: gnuplot> set data style lines gnuplot> set term png color gnuplot> set title "Temperature" gnuplot> set xlabel "Day of Year" gnuplot> set ylabel "Degrees C" gnuplot> set output "/home/mmsa/wwwroot/mmsa/images/weekly/PlatformTemp.png" gnuplot> plot '/cygdrive/c/WINNT/TEMP/@1984.0' notitle gnuplot: not found Read in and set various lists, starting plots. Last depth reading: [[7.458333333333333, 3.8610000000000002]] Traceback (most recent call last): File "/home/mmsa/bin/python/Plotmmsa.py", line 106, in ? g('set output "/home/mmsa/wwwroot/mmsa/images/daily/PlatformTemp.png"') File "/usr/lib/python2.2/site-packages/Gnuplot/_Gnuplot.py", line 206, in __call__ self.gnuplot(s) File "/usr/lib/python2.2/site-packages/Gnuplot/gp_unix.py", line 203, in __call__ self.flush() IOError: [Errno 32] Broken pipe _________________________________________________________ Any suggestions would be much appreciated. My next step will be to get gnuplot.py running on a linux box and see if I have the same problems there. Thanks in advance, mtc -- =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= Michael Colee Internet: mt...@ic... ICESS & Bren SESM Phone : (805) 893-2883 University of California Fax : (805) 893-6113 Santa Barbara CA 93106-3060 Office : 1001 Bren Hall =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= |
