The subtitle of this post mentions a wheel - before I get to the wheel I want...]]> Mon, 26 May 2014 16:26:13 +0000 Christopher Felton https://www.dsprelated.com/showarticle/194.php In the last posts I reviewed how to use the Python scipy.signal package to design digital infinite impulse response (IIR) filters, specifically, using the iirdesign function (IIR design I and IIR design II ).  In this post I am going to conclude the IIR filter design review with an example.

Previous posts:

First, I think ipython is great. I use it daily and always have an ipython terminal open.  But just recently, I was showing off the ipython 0.12 notebook and in the process created a lengthy example while demonstrating the cool features of the ipython notebook.  The example included LaTeX equations, plots, etc.  Since the notebook session was on something of...]]> Wed, 02 May 2012 02:16:34 +0000 Christopher Felton https://www.dsprelated.com/showarticle/158.php There has been some chatter on the scipy-dev mailing list lately about enhancing the scipy.signal package.  Unfortunately, there seems to be a split.  Some are going off and starting a new package scikit-signal.  The original developer, Travis Oliphant, appears to have strong interest in seeing the scipy.signal evovle.  If you are...]]> Thu, 19 Jan 2012 13:01:01 +0000 Christopher Felton https://www.dsprelated.com/showarticle/157.php Full Disclosure: The publisher of this book, PACKT, was soliciting reviewers.  I volunteered to review the book and the publisher sent me an e-version of the book.

The following is a review of "Numpy 1.5 Beginner's Guide", "Learn by doing: less theory, more results" by Ivan Idris.  As the title...]]> Sat, 07 Jan 2012 21:08:22 +0000 Christopher Felton https://www.dsprelated.com/showarticle/151.php Everyone has their favorite computing platform, regardless if it is Matlab, Octave, Scilab, Mathematica, Mathcad, etc.  I have been using Python and the common numerical and scientific packages available.  Personally, I have found this to be very useful in my work.  Lately there has been some chatter on speeding up Python.

From another project I follow, Sat, 17 Sep 2011 05:28:17 +0000 Christopher Felton https://www.dsprelated.com/showarticle/138.php Recently, I stumbled upon a stepped-triangular (ST) approximation that can be implemented as a cascade of recursive running sum (RRS) filters.  The following is a short introduction to the stepped-triangular approximation.The stepped-triangular approximation was introduced by Jovanovic-Dolecek and Mitra [1] as a quantized approximation of a low-pass filter (LPF).  Figure 1 shows an...]]> Sat, 06 Aug 2011 02:40:43 +0000 Christopher Felton https://www.dsprelated.com/showarticle/139.php The finite-word representation of fractional numbers is known as fixed-point.  Fixed-point is an interpretation of a 2's compliment number usually signed but not limited to sign representation.  It extends our finite-word length from a finite set of integers to a finite set of rational real numbers Mon, 25 Apr 2011 09:58:23 +0000 Christopher Felton https://www.dsprelated.com/showarticle/121.php Every 6 months Mathworks hosts an online Matlab programming contest.  If you love or hate Matlab check out the contest.  The group does a really good job putting together the puzzles.  The contest runs for a week and starts today at noon EST (10 Nov 2010).  

If you are an experienced Matlab programmer or new to Matlab it is worth checking out.  Even if you do not...]]> Wed, 10 Nov 2010 14:52:37 +0000 Christopher Felton