search for: raje

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2009 Oct 07
1
Save plot to text file
Dear all:I am sorry if I have missed a solution posted earlier. My collaborator (sitting in a different time zone and not on R) wants to re-plot the charts that I have obtained after some complex processing. There are thirty charts in all, of different types, and some are multi-plots (plot(new=T)). Is there a way to 'save' or 'dump just the x-y coordinates to a text/ASCII file, like
2009 Mar 25
1
Density estimation: scale back for calendar time
Dear all:Request your indulgence. The econophysics gurus do this stuff all the time: all their PDFs are smooth, with neat log x axis. 1. The kernel density estimate (KDE) function returns the empirical probability density at 2^n points (min: 512). The big question is how do I scale back the x-values (say, density$x) to x-values in terms of the original dataset? 2. To give you a concrete idea, i
2009 Mar 18
0
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