[Plplot-devel] plplot-octave error while plotting
Hi Everybody, I am looking into the error reported in Launchpad (Ubuntu's bug tracking tool) in this link https://bugs.edge.launchpad.net/ubuntu/+source/plplot/+bug/259058 It will be great if someone could comment on that bug as to whether it is a known issue or any proposed suggestions to fix it. I will be more than willing to help if any further information regarding the bug report is necessary. Thanks in Advance. Regards, Aanjhan - This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100url=/ ___ Plplot-devel mailing list Plplot-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/plplot-devel
Re: [Plplot-devel] New test script
On Aug 17, 2008, at 11:43 PM, Andrew Ross wrote: Jerry, I'm not quite sure what your latest commit is intended to do? It certainly doesn't reproduce the C results for me. The plplot time functions use 0.0 to represent January 1, 1970. This is the usual unix convention for the epoch in C time functions. You have set xmin to be 0.0 by subtracting 2 identical times from each other, hence the label you see. Is this really what you see with the C version of the example as well? Yes. x29c labels the first major tic as 1970-01-14 and it is 14 minor tics to the right of the left side of the plot. Three additional labeled tics are at 1970-01-28, 1970-02-11, and 1970-02-25. The tweaks that I made in my latest commit cause the generated PS code from both Ada examples to match that from the C example. Maybe there is something wrong with the C time functions on OS X. The C version is complicated because the C time functions are rather unhelpful when it comes to timezones. The example is designed to be in UTC (Universal coordinate time). This is the norm for scientific applications to avoid problems with synchronising measurements made in different locations. Anyway, the C functions mostly work in the local time zone. What we want is to turn a time broken down into year, month, day, hour, min, sec into a time in seconds since January 1 1970. To achieve this using POSIX functions you have to set the timezone to be UTC (by setting the TZ variable and then calling tzset). The call to mktime (which uses the time in the current time zone) will then assume time in UTC rather than local time. This is not particularly pretty and may not work on Windows platforms (testing appreciated!) Is there any way in ada to convert a broken down time (in UTC) into a time in seconds since Jan 1 1970? From a brief look at the gnat manuals it seems that ada time functions are also rather muddled when it comes to time zones. I have not studied the GNAT manuals or the Ada Reference Manual in detail wrt the time functions. (BTW, there are probably GNAT calendar functions that extend the Ada-specified calendar functions. The function that I am using, Time_Of, is standard Ada and not a GNAT extension.) The method that I am using seems to me to be time-zone agnostic, or rather, assumes the same time zone in all calculations. I think that that should work for this example. There appears to be support for many time functions, including leap seconds, in Ada.Calendar.Time_Zones, http://www.adaic.com/standards/ 05rm/html/RM-9-6-1.html, but since the PLplot example should work assuming that the time zones are the same for all dates, there should be no need to use any of the fancy stuff. Jerry Cheers Andrew On Sat, Aug 16, 2008 at 05:31:15PM -0700, Jerry wrote: I have made Ada example 29 once again generate identical PS to C. However, I don't understand what is going on in the C example. The code sets up the initial time of the plot to be December 1, 2005, but the horizontal label on the plot begins on January 1, 1970. Jerry On Aug 14, 2008, at 11:51 AM, Andrew Ross wrote: Ada is not too far off. Currently example 20 is missing (plgriddata not implemented?). There are differences with example 21 (plrandd not implemented) and example 29 (problems with Ada calendar functions - we could just hard code in the time value if required - not a plplot issue.) There is also the open 64-bit issue with example 19. - This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100url=/ ___ Plplot-devel mailing list Plplot-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/plplot-devel
Re: [Plplot-devel] Missing docs on plimage
On Mon, Aug 18, 2008 at 7:58 PM, Jerry [EMAIL PROTECTED] wrote: The HTML docs at http://plplot.sourceforge.net/docbook-manual/plplot- html-5.9.0/ do not contain a mention of plimage (or plimagefr which I think is new). However, the PDF version at http:// plplot.sourceforge.net/docbook-manual/plplot-5.9.0.pdf does contain a reference to plimage but only in the list of subroutines in the API at the beginning of Chapter 21; there is no further description. Jerry, The PLplot documentation in Subversion has been updated with information on plimage and plimagefr, but the documentation updates were added after 5.9.0 was released. Until the next release, your best bet is probably some combination of: - Read the raw docbook-formatted documentation here: http://plplot.svn.sourceforge.net/viewvc/plplot/trunk/doc/docbook/src/api.xml?view=markup (search for plimage or plimagefr) or check out the PLplot from Subversion and build the documentation on your system - Look at example 20 for examples of how to use plimage and plimagefr. plimagefr is currently only included in the Subversion version of example 20. - Ask on the list(s) Hope this helps, Hez -- Hezekiah M. Carty Graduate Research Assistant University of Maryland Department of Atmospheric and Oceanic Science - This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100url=/ ___ Plplot-devel mailing list Plplot-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/plplot-devel
Re: [Plplot-devel] Missing docs on plimage
Thanks, Hez. Jerrhy On Aug 18, 2008, at 6:56 PM, Hezekiah M. Carty wrote: On Mon, Aug 18, 2008 at 7:58 PM, Jerry [EMAIL PROTECTED] wrote: The HTML docs at http://plplot.sourceforge.net/docbook-manual/plplot- html-5.9.0/ do not contain a mention of plimage (or plimagefr which I think is new). However, the PDF version at http:// plplot.sourceforge.net/docbook-manual/plplot-5.9.0.pdf does contain a reference to plimage but only in the list of subroutines in the API at the beginning of Chapter 21; there is no further description. Jerry, The PLplot documentation in Subversion has been updated with information on plimage and plimagefr, but the documentation updates were added after 5.9.0 was released. Until the next release, your best bet is probably some combination of: - Read the raw docbook-formatted documentation here: http://plplot.svn.sourceforge.net/viewvc/plplot/trunk/doc/docbook/ src/api.xml?view=markup (search for plimage or plimagefr) or check out the PLplot from Subversion and build the documentation on your system - Look at example 20 for examples of how to use plimage and plimagefr. plimagefr is currently only included in the Subversion version of example 20. - Ask on the list(s) Hope this helps, Hez -- Hezekiah M. Carty Graduate Research Assistant University of Maryland Department of Atmospheric and Oceanic Science - This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100url=/ ___ Plplot-devel mailing list Plplot-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/plplot-devel
Re: [Plplot-devel] New test script
On Aug 18, 2008, at 5:04 PM, Alan W. Irwin wrote: On 2008-08-18 16:04-0700 Jerry wrote: On Aug 17, 2008, at 11:43 PM, Andrew Ross wrote: Jerry, I'm not quite sure what your latest commit is intended to do? It certainly doesn't reproduce the C results for me. The plplot time functions use 0.0 to represent January 1, 1970. This is the usual unix convention for the epoch in C time functions. You have set xmin to be 0.0 by subtracting 2 identical times from each other, hence the label you see. Is this really what you see with the C version of the example as well? Yes. x29c labels the first major tic as 1970-01-14 and it is 14 minor tics to the right of the left side of the plot. Three additional labeled tics are at 1970-01-28, 1970-02-11, and 1970-02-25. The tweaks that I made in my latest commit cause the generated PS code from both Ada examples to match that from the C example. Maybe there is something wrong with the C time functions on OS X. The C version is complicated because the C time functions are rather unhelpful when it comes to timezones. The example is designed to be in UTC (Universal coordinate time). This is the norm for scientific applications to avoid problems with synchronising measurements made in different locations. Anyway, the C functions mostly work in the local time zone. What we want is to turn a time broken down into year, month, day, hour, min, sec into a time in seconds since January 1 1970. To achieve this using POSIX functions you have to set the timezone to be UTC (by setting the TZ variable and then calling tzset). The call to mktime (which uses the time in the current time zone) will then assume time in UTC rather than local time. This is not particularly pretty and may not work on Windows platforms (testing appreciated!) Is there any way in ada to convert a broken down time (in UTC) into a time in seconds since Jan 1 1970? From a brief look at the gnat manuals it seems that ada time functions are also rather muddled when it comes to time zones. I have not studied the GNAT manuals or the Ada Reference Manual in detail wrt the time functions. (BTW, there are probably GNAT calendar functions that extend the Ada-specified calendar functions. The function that I am using, Time_Of, is standard Ada and not a GNAT extension.) The method that I am using seems to me to be time-zone agnostic, or rather, assumes the same time zone in all calculations. I think that that should work for this example. There appears to be support for many time functions, including leap seconds, in Ada.Calendar.Time_Zones, http://www.adaic.com/standards/ 05rm/html/RM-9-6-1.html, but since the PLplot example should work assuming that the time zones are the same for all dates, there should be no need to use any of the fancy stuff. Local time includes daylight savings shifts as discussed previously on this list so politicians sometimes screw up your above assumption for certain epochs and locales. tstart is the number of seconds between two _UTC_ epochs to avoid such problems. This is commented pretty well in the C code. /* tstart is a time_t value (cast to PLFLT) which represents the number * of seconds elapsed since 00:00:00 on January 1, 1970, Coordinated * Universal Time (UTC) on 2005-12-01 (UTC). */ As somebody pointed out earlier, daylight savings was in effect for 1970-01-01 while not in effect for 2005-12-01 in Britain. Thus, if you use local time in example 29 rather than UTC, British residents get a different (wrong) result than those without a daylight savings time change between the two epochs. Politicians love to fiddle with daylight savings as illustrated for the case of daylight savings in Britain for the 1970-01-01 (winter) epoch. Therefore, the only safe thing to do for all locales is to use UTC for both epochs which is what the C code does now. You should do the same for the Ada case, and it looks like that will be quite possible from the Ada.Calendar.Time_Zones reference you gave above. By the way, the current Ada example 29 gives a result that is different from the C result for my locale using Linux. But unlike Andrew's case, for my locale there is no daylight savings shift between the two above UTC epochs. Thus, the difference I see must be due to some other issue than the daylight savings one mentioned above. I believe this additional issue is a recently introduced one because I think the Ada example 29 results were previously agreeing with the corresponding C result here. Yes, the Ada and C versions previously agreed. And it was the Ada calendar that found the 3600 second error in some of the bindings that had hard-wired the time offset in example 29. As I see it, the first thing that has to be reckoned with is why x29c.c is mislabeling the axis on OS X. I've pasted a screen shot as a PDF but I suppose it won't survive the list mail process. Jerry pastedGraphic.pdf Description:
Re: [Plplot-devel] New test script
On 2008-08-18 20:17-0700 Jerry wrote: As I see it, the first thing that has to be reckoned with is why x29c.c is mislabeling the axis on OS X. I've pasted a screen shot as a PDF but I suppose it won't survive the list mail process. No, it got attached fine, but its first label is 1970-01-14 which is not at all in agreement with the C result I get here whose first label is 2005-12-14 (then every two weeks after that in agreement with the Hours of television watched in Dec 2005 / Jan 2006 title). Hazen, does your 3rd page x29 C result on Mac OS X agree with Jerry's or mine? Alan __ Alan W. Irwin Astronomical research affiliation with Department of Physics and Astronomy, University of Victoria (astrowww.phys.uvic.ca). Programming affiliations with the FreeEOS equation-of-state implementation for stellar interiors (freeeos.sf.net); PLplot scientific plotting software package (plplot.org); the libLASi project (unifont.org/lasi); the Loads of Linux Links project (loll.sf.net); and the Linux Brochure Project (lbproject.sf.net). __ Linux-powered Science __ - This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100url=/ ___ Plplot-devel mailing list Plplot-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/plplot-devel
Re: [Plplot-devel] New test script
On 2008-08-18 21:32-0700 Alan W. Irwin wrote: On 2008-08-18 20:17-0700 Jerry wrote: As I see it, the first thing that has to be reckoned with is why x29c.c is mislabeling the axis on OS X. I've pasted a screen shot as a PDF but I suppose it won't survive the list mail process. No, it got attached fine, but its first label is 1970-01-14 which is not at all in agreement with the C result I get here whose first label is 2005-12-14 (then every two weeks after that in agreement with the Hours of television watched in Dec 2005 / Jan 2006 title). Hazen, does your 3rd page x29 C result on Mac OS X agree with Jerry's or mine? Jerry, see also http://plplot.sourceforge.net/examples-data/demo29/x29.03.png which IIRC was generated on a Debian sarge box by Hazen (not his Mac OS X system) and agrees with the result I get on my Debian lenny box. Alan __ Alan W. Irwin Astronomical research affiliation with Department of Physics and Astronomy, University of Victoria (astrowww.phys.uvic.ca). Programming affiliations with the FreeEOS equation-of-state implementation for stellar interiors (freeeos.sf.net); PLplot scientific plotting software package (plplot.org); the libLASi project (unifont.org/lasi); the Loads of Linux Links project (loll.sf.net); and the Linux Brochure Project (lbproject.sf.net). __ Linux-powered Science __ - This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100url=/ ___ Plplot-devel mailing list Plplot-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/plplot-devel
