Re: [Tutor] python and kiviat diagrams
Hi all, Thanks for your insightful answers, and a merry Christmas + a happy new year! Btw, somebody on the list mentioned rpy as an alternative way to create spider charts. I also think that's a better route to take. R is thoroughly tested and built for the job, and if you ever need more statistical/plotting things, you could easily extend your program. Cheers!! Albert-Jan ~~ In the face of ambiguity, refuse the temptation to guess. ~~ --- On Thu, 12/24/09, Kent Johnson ken...@tds.net wrote: From: Kent Johnson ken...@tds.net Subject: Re: [Tutor] python and kiviat diagrams To: Albert-Jan Roskam fo...@yahoo.com Cc: dwbarne dwba...@earthlink.net, python tutor tutor@python.org Date: Thursday, December 24, 2009, 2:19 PM On Wed, Dec 23, 2009 at 5:27 PM, Albert-Jan Roskam fo...@yahoo.com wrote: I was studying the code on http://matplotlib.sourceforge.net/examples/api/radar_chart.html. Isn't it very unusual that a class is defined within a function? Unusual, but not un-heard of. Usually the function is a factory function that returns the class to the caller. In this case the class is registered as the handler for projections of type 'radar'. Presumably RadarAxes is implementing a protocol (interface) that is required by register_projection(). Why not use a class instance inside the function instead? Presumably register_projection() requires a class (strictly speaking, it probably requires a callable that returns an instance of a class that implements the required protocol). There don't seem to be any docs for register_projection() so it's hard to know for sure what it wants. No methods of the class can currently be inherited outside the scope of the function, right? Do you mean, the class cannot be subclassed? Not easily, only because the function doesn't return the class. There is no inherent reason this class could not be subclassed if a reference to the class were available. Kent ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] python and kiviat diagrams
I was studying the code on http://matplotlib.sourceforge.net/examples/api/radar_chart.html. Isn't it very unusual that a class is defined within a function? Why not use a class instance inside the function instead? No methods of the class can currently be inherited outside the scope of the function, right? Just curious.. Cheers!! Albert-Jan ~~ In the face of ambiguity, refuse the temptation to guess. ~~ --- On Tue, 12/22/09, Kent Johnson ken...@tds.net wrote: From: Kent Johnson ken...@tds.net Subject: Re: [Tutor] python and kiviat diagrams To: dwba...@earthlink.net Cc: python tutor tutor@python.org Date: Tuesday, December 22, 2009, 10:45 PM On Tue, Dec 22, 2009 at 1:18 PM, dwba...@earthlink.net wrote: One of the drawbacks of Matplotlib is that it does not have the capability of drawing Kiviat diagrams. Does anyone know of a software package for drawing Kiviat diagrams written in Python? I don't know what a Kiviat diagram is but the images google shows me look a lot like this: http://matplotlib.sourceforge.net/examples/api/radar_chart.html Kent ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] python and kiviat diagrams
On 12/23/2009 2:27 PM Albert-Jan Roskam said... I was studying the code on http://matplotlib.sourceforge.net/examples/api/radar_chart.html. Isn't it very unusual that a class is defined within a function? Not when defining factory creation functions which a quick look at this code confirms that's what this says it's doing. They're often used when creating compatibility layers to provide common named methods. Why not use a class instance inside the function instead? That's a question for the original developer. You can get to the same place in many different ways, and the concept of 'There should be one-- and preferably only one --obvious way to do it.' no longer commands the same respect at this level of design. No methods of the class can currently be inherited outside the scope of the function, right? Yes -- the class has served it's purpose once it's been registered. It can of course be reached and could likely be invoked and could even possibly be used to create new instances, but you'd have to introspect and find the right __class__ attribute. Both this level of introspection and factory methods are intermediate to advanced techniques that most of us will only rarely need, but it's good to know it can be done. Emile ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] python and kiviat diagrams
Hello Daniel. There's a statistical package named R, from http://r-project.org that has pretty much everything related to statistics and data analysis. Kiviat diagrams, also known as star plots, or web plots etc., are among its abilities -- directly or using packages like 'rela' or 'homals', all available from the Comprehensive R Archive Network, or cran, at http://cran.r-project.org/ Its many abilities can be easily used in Python through the rpy package, that is available from http://rpy.sourceforge.net/ All the best, hilton On Tuesday 22 December 2009 16:18:56 dwba...@earthlink.net wrote: One of the drawbacks of Matplotlib is that it does not have the capability of drawing Kiviat diagrams. Does anyone know of a software package for drawing Kiviat diagrams written in Python? Daniel ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor -- Hilton Garcia Fernandes Nucleo de Tecnologias sem Fio (NTSF) -- Wireless Technologies Team Lab de Sistemas Integraveis Tecnologico (LSI) -- Integrable Systems Lab Escola Politecnica (Poli) -- Engineering School Univ S Paulo (USP) Tel: (5511)3091-5311 (work) (5511)8131-5213 (mobile) Av. Prof. Luciano Gualberto,158 trav.3 CEP 05508-010 S. Paulo -- SP -- Brazil Pagina inicial: http://www.lsi.usp.br/~hgfernan ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] python and kiviat diagrams
On Tue, Dec 22, 2009 at 1:18 PM, dwba...@earthlink.net wrote: One of the drawbacks of Matplotlib is that it does not have the capability of drawing Kiviat diagrams. Does anyone know of a software package for drawing Kiviat diagrams written in Python? I don't know what a Kiviat diagram is but the images google shows me look a lot like this: http://matplotlib.sourceforge.net/examples/api/radar_chart.html Kent ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] python and kiviat diagrams
Congratulations ! It looks like matplotlib does the trick. I became an rpy evangelist because this binding connect two very interesting, powerful and flexible things: R and Python. Thanks, hilton On Tuesday 22 December 2009 19:45:18 Kent Johnson wrote: On Tue, Dec 22, 2009 at 1:18 PM, dwba...@earthlink.net wrote: One of the drawbacks of Matplotlib is that it does not have the capability of drawing Kiviat diagrams. Does anyone know of a software package for drawing Kiviat diagrams written in Python? I don't know what a Kiviat diagram is but the images google shows me look a lot like this: http://matplotlib.sourceforge.net/examples/api/radar_chart.html Kent ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor -- Hilton Garcia Fernandes Nucleo de Tecnologias sem Fio (NTSF) -- Wireless Technologies Team Lab de Sistemas Integraveis Tecnologico (LSI) -- Integrable Systems Lab Escola Politecnica (Poli) -- Engineering School Univ S Paulo (USP) Tel: (5511)3091-5311 (work) (5511)8131-5213 (mobile) Av. Prof. Luciano Gualberto,158 trav.3 CEP 05508-010 S. Paulo -- SP -- Brazil Pagina inicial: http://www.lsi.usp.br/~hgfernan ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] python and kiviat diagrams
OK. But, please don't you forget to try R and rpy ! :) These guys do very clever tricks. On Tuesday 22 December 2009 20:39:35 dwba...@earthlink.net wrote: Kent and Hilton, I'm a victim of outdated documentation. Mine is v0.98 (no radar charts), while latest is v0.99. A small step in numbers, but a giant leap in capability! Thanks! Looks like Matplotlib will do the trick after all. Daniel -Original Message- From: Kent Johnson ken...@tds.net Sent: Dec 22, 2009 4:45 PM To: dwba...@earthlink.net Cc: python tutor tutor@python.org Subject: Re: [Tutor] python and kiviat diagrams On Tue, Dec 22, 2009 at 1:18 PM, dwba...@earthlink.net wrote: One of the drawbacks of Matplotlib is that it does not have the capability of drawing Kiviat diagrams. Does anyone know of a software package for drawing Kiviat diagrams written in Python? I don't know what a Kiviat diagram is but the images google shows me look a lot like this: http://matplotlib.sourceforge.net/examples/api/radar_chart.html Kent -- Hilton Garcia Fernandes Nucleo de Tecnologias sem Fio (NTSF) -- Wireless Technologies Team Lab de Sistemas Integraveis Tecnologico (LSI) -- Integrable Systems Lab Escola Politecnica (Poli) -- Engineering School Univ S Paulo (USP) Tel: (5511)3091-5311 (work) (5511)8131-5213 (mobile) Av. Prof. Luciano Gualberto,158 trav.3 CEP 05508-010 S. Paulo -- SP -- Brazil Pagina inicial: http://www.lsi.usp.br/~hgfernan ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] python and kiviat diagrams
Kent and Hilton, I'm a victim of outdated documentation. Mine is v0.98 (no radar charts), while latest is v0.99. A small step in numbers, but a giant leap in capability! Thanks! Looks like Matplotlib will do the trick after all. Daniel -Original Message- From: Kent Johnson ken...@tds.net Sent: Dec 22, 2009 4:45 PM To: dwba...@earthlink.net Cc: python tutor tutor@python.org Subject: Re: [Tutor] python and kiviat diagrams On Tue, Dec 22, 2009 at 1:18 PM, dwba...@earthlink.net wrote: One of the drawbacks of Matplotlib is that it does not have the capability of drawing Kiviat diagrams. Does anyone know of a software package for drawing Kiviat diagrams written in Python? I don't know what a Kiviat diagram is but the images google shows me look a lot like this: http://matplotlib.sourceforge.net/examples/api/radar_chart.html Kent ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
