spikes Archive
Interpolation Versus Resampling To Increase The Sample Rate
Posted on June 22, 2009 | 5 CommentsThese are two different techniques aimed at different objectives. First consider a simple sinewave that has been sampled close to the Nyquist frequency (sample rate/2). Visually this looks very pointy. We...
Cleaning Up Data
Posted on September 22, 2003 | No CommentsWhen we have a very noisy signal with a large number of spikes and signal bursts then if all else fails try Median Filtering. This is a technique often used...
Data Smoothing : RC Filtering And Exponential Averaging
Posted on April 28, 2003 | 7 CommentsWhat are RC Filtering and Exponential Averaging and how do they differ? The answer to the second part of the question is that they are the same process! If one...
Smoothing Spectral Data
Posted on July 15, 2002 | No CommentsSometimes data has spikes which are clearly artefacts of the processing or are due to some other external source. One is used to seeing these on time series but in...
Don’t Let Spikes Spoil Your Data
Posted on June 6, 2001 | No CommentsIn many real-world applications it is impossible to avoid “spikes” or “dropouts” in data that we record. Many people assume that these only cause problems with their data if they...
Getting Rid Of Spikes
Posted on June 6, 2001 | No CommentsFor various reasons data captured in the real world often contains spikes that will give erroneous results when analysed. DATS for Windows provides various ways of editing and removing these...
