kalman filter - python implementation
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From: Tim Wescott on 9 Jun 2010 12:48 On 06/09/2010 09:35 AM, Rob Gaddi wrote: > On 6/8/2010 9:05 PM, Erik de Castro Lopo wrote: >> Nasser M. Abbasi wrote: >> >>> On 6/8/2010 6:55 PM, HardySpicer wrote: >>> >>>> On Jun 9, 7:41 am, "grzegorz g." >>>> >>>> Why the Hell Python? Why not use Javascript while you're at it! >>> >>> fyi, Python is used a lot in mathematics software these days. >> >> But its not used much for DSP code. For DSP its usually C, C++ >> or matlab/octave. >> >>> Sage uses >>> Python, Numpy is in Python, as well as SciPy, and many more. Many >>> people write scientific software in Python. >> >> Many people drink too much alcohol and then drive motor vehicles. >> That still doesn't make it a good idea. >> >> Erik > > There's no reason not to. It's handy in that it really allows you to > bang out algorithms quickly rather than getting caught up in > implementational details. Then if the ultimate target is some > overpowered Core Duo, you might as well leave it Python (the speed hit's > not as bad as you think), or if it's not then you rewrite it in C, C++, > Ada, Forth, assembly, VHDL, etc depending on your target, but at least > you know that if it doesn't work the error's in the porting, not the > algorithm. > Which is exactly what you'd say about Scilab, Octave, Matlab, etc. -- Tim Wescott Control system and signal processing consulting www.wescottdesign.com
From: claudegps on 9 Jun 2010 13:26 [cut] > Can someone help me, cos I have no idea what's wrong ? Mmm... a bit too much code there :) Why not you try to the same computation using... err... octave?... and check numbers step-by-step to understand where the error is? I do python, so I could help... do you want to share directly .py files?
From: HardySpicer on 9 Jun 2010 15:07 On Jun 9, 3:18 pm, "Nasser M. Abbasi" <n...(a)12000.org> wrote: > On 6/8/2010 6:55 PM, HardySpicer wrote: > > > On Jun 9, 7:41 am, "grzegorz g." > > > Why the Hell Python? Why not use Javascript while you're at it! > > fyi, Python is used a lot in mathematics software these days. Sage uses > Python, Numpy is in Python, as well as SciPy, and many more. Many > people write scientific software in Python. > > --Nasser What the hell is Sage and Numpty? Ever heard of Matlab? Far easier.
From: grzegorz g. on 9 Jun 2010 15:12 >Jerry, > >I did not insult the poster or the fact the he is using Python as his programming language of choice - "brickbats" is harsh to say the least. I am, however, keenly aware of the tone of his last message. > >It is okay to be frustrated with a problem you are trying to solve, but extending it into a public forum where you ask individuals for their time and their experiences to help is another. > > >Michael. Michael, I also didn't insult anybody and I didn't extend a frustration. I only reacted on offtop (often agressive, without any arguments) >[cut] >> Can someone help me, cos I have no idea what's wrong ? > > >Mmm... a bit too much code there :) >Why not you try to the same computation using... err... octave?... and >check numbers step-by-step to understand where the error is? > > >I do python, so I could help... do you want to share directly .py >files? > I apreciate it very much, py file is here (no popups): http://home.elka.pw.edu.pl/~ggwardys/ thx ! :)
From: Tim Wescott on 9 Jun 2010 15:13
On 06/09/2010 12:07 PM, HardySpicer wrote: > On Jun 9, 3:18 pm, "Nasser M. Abbasi"<n...(a)12000.org> wrote: >> On 6/8/2010 6:55 PM, HardySpicer wrote: >> >>> On Jun 9, 7:41 am, "grzegorz g." >> >>> Why the Hell Python? Why not use Javascript while you're at it! >> >> fyi, Python is used a lot in mathematics software these days. Sage uses >> Python, Numpy is in Python, as well as SciPy, and many more. Many >> people write scientific software in Python. >> >> --Nasser > > What the hell is Sage and Numpty? Ever heard of Matlab? Far easier. Until you go to distribute it, and find out that you have to pay enough to buy a really nice car for each copy of Matlab that you give away. Matlab is _expensive_. While it delivers considerable value, there are free alternatives that do as well or better than Matlab. From a standpoint of how much you gain vs. how much you pay, Matlab is _horrible_. -- Tim Wescott Control system and signal processing consulting www.wescottdesign.com |