Pradeep Raje
2009-Mar-18 08:14 UTC
[R] Wavelet reconstruction with coefficients set to zero
Dear all: Greetings from Mumbai, India. Reference?R help solution [Rogerio, Thu 16 Nov 2006 - 20:54:25 GMT]. Simonsen, Jensen and Johansen (2002) [arXiv:cond-mat/0202352v1] note "(.wavelet filtered was...) achieved?by first transforming the log-price [...] to the?wavelet-domain, setting all wavelet coefficient corresponding?to scales larger then 1000 trading days to zero, and finally transforming back to the time domain." Question: What does 'scales larger than 1000 trading days' mean? Does it mean all coefficients ?of order more than 10 (1024=2^10) equal to zero? Or am I missing something? Rogerio's?solution [Thu 16 Nov 2006 - 20:54:25 GMT] doesn't seem to work{waveslim, modwt, la8, boundary=periodic, serieslength=3464}; also tried with la4, but the reconstruction is too smooth, almost flat.?Any help will be appreciated. regards, pradeep
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