I have been given a wav file of train locomotive noise - literally something you can play back and hear. Using the audio package and the load.wave function I have got a 1.5 million element vector which visually at least has some periodicity in certain parts and does not seem to be completely random. Most elements (99%) are within a range of about -0.14 to +0.14 with occasional outliers. Beneath is a typical short segment.
This is the head: sample rate: 16000Hz, mono, 16-bits [1] -3.051851e-05 6.103516e-05 -6.103702e-05 3.051758e-05 3.051758e-05 -1.220740e-04 Most elements (99%) are within a range of about -0.14 to +0.14 with occasional outliers This is the same kind of output as is illustrated in the documentation: https://cran.r-project.org/web/packages/seewave/vignettes/seewave_IO.pdf What I am not sure about, and I can't find any clear explanation, is what these elements actually stand for? I would have thought that one needed as a minimum both volume and frequency ie a two dimensional vector but as far as I can tell there is only one single vector. I'm aware that this question is pushing the envelope of R help but... Thanks, Nick Wray ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
