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I'd like to compute power spectral density of time series; do some bandpass, lowpass, and highpass filtering; maybe some other basic stuff. Is there a nice open-source Java library to do this? I've hunted a bit without success (e.g., Googling 'power spectral density java' or 'signal processing java' and clicking through links, looking in Apache Commons, Sourceforge, java.net, etc.).

There are lots of applets, books, tutorials, commercial products, etc., that don't meet my needs. Update: I found for Fourier transforms. This doesn't implement power spectral density, bandpass, etc., but it is something. Closed as off-topic by,,,, Aug 14 '14 at 21:12 This question appears to be off-topic. General International Standard Archival Description 2nd Edition. The users who voted to close gave this specific reason: • 'Questions asking us to recommend or find a book, tool, software library, tutorial or other off-site resource are off-topic for Stack Overflow as they tend to attract opinionated answers and spam. Instead, describe the problem and what has been done so far to solve it.' – Raedwald, Alexandre Santos, Mark Rotteveel, Artjom B., Anthony Kong If this question can be reworded to fit the rules in the, please.

My first suggestion is to not do your DSP implementation in Java. My second suggestion would be to roll your own simple DSP implementations yourself in Java. Why not to use Java: I have lots of experience writing DSP code over the last 10+ years. And almost none of the DSP code is in Java. So forgive me when I am hesitant to read about someone who wants to implement DSP in Java. If you are going to be doing non-trivial DSP then you shouldn't be using Java. The reason that DSP is so painful to implement in Java is because all the good DSP implementations use low level memory management tricks, pointers (crazy amounts of pointers), large raw data arrays, etc.

Why to use Java: If you are doing simple DSP stuff roll your own Java implementation. Simple DSP things like PSD and filtering are both relatively easy to implement (easy implementation but they won't be fast) because there is soo many implementation examples and well documented theory online. Wondershare Video Converter Ultimate Crack 8.1.1. In my case I implemented a PSD function in Java once because I was graphing the PSD in a Java GUI so it was easiest to just take the performance hit in Java and have the PSD computed in the java GUI and then plot it. How to implement a PSD: The PSD is usually just the magnitude of the FFT displayed in dB. There are many examples from academic, commercial and open-source showing how to compute the magnitude of the FFT in dB. For example output and then you just need to convert to magnitude and dB.