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December 2006

Analyze the Sunspots

by YukuanBlog
上次以 Python 搭配 matplotlib 改寫張智星老師傅立葉轉換教學例子。後來逛到 Anders Andreasen 的專文,裡面有個分析太陽黑子活動週期的例子,相同的例子竟然也出現在 Mathworks 展示 Matlab FFT 用法的網頁上。既然大家那麼愛用太陽黑子,我也來攪和攪和,再次以 Python 搭配 matplotlib 改寫,以饗各位看官:

FFT in Python

by YukuanBlog
張智星老師的 on-line book《音訊處理與辨識》的〈離散傅立葉轉換〉這個章節,有許多運用快速傅立葉轉換(Fast Fourier transform, FFT)的教學,FFT 其實就是 DFT 的快速算法。張老師是以 Matlab 作為程式範例;實際嘗試後,我發現可以很容易將其轉成 Python code ,

August 2006

April 2006

March 2006

February 2006

January 2006


by YukuanMark
Project rlabplus is a continuation of work on an open-source scripting environment for scientific computations RLaB2. Project rlabplus provides release 2 of RLaB2, which contains upgrades of the numerical libraries used in the first release, and many new

Common tasks in 6.302 using Octave, Scilab, and Matlab

by YukuanMark
This document describes how to perform common tasks in 6.302 using Octave, Scilab, and Matlab. The first two software packages are free alternatives to Matlab, and their use is encouraged.

Speed in choosing a data analysis software.

by YukuanMark
Speed of execution is an important aspect in choosing a data analysis software. Since it can vary from a factor 10, or more, on the same computer, this can make the difference between a quick-reacting package and another one that seems to takes hours to c

Scilab Home Page

by YukuanMark
Scilab is a scientific software package for numerical computations providing a powerful open computing environment for engineering and scientific applications. Developed since 1990 by researchers from INRIA and ENPC, it is now maintained and developed by

Matlab Clones

by YukuanMark
Matlab™ has become the de facto standard for DSP system design and simulation. However, Matlab has two problems: 1) it's expensive, and 2) it costs a lot. Fortunately, there are alternatives: Free Clones. Whatever else you can say about them, these Free

Octave Home Page

by YukuanMark & 1 other
GNU Octave is a high-level language, primarily intended for numerical computations. It provides a convenient command line interface for solving linear and nonlinear problems numerically, and for performing other numerical experiments using a language that

December 2005

November 2005

The cocktail party problem

by YukuanBlog

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