Hello, I thought I understood filter() with the help from Prof. Grothendieck, but I guess I did not. For example, how does this work:
filter(1:10, c(0.1, 0.5, 1, 0.5), "recursive", init=c(1,2,3,4)) Time Series: Start = 1 End = 10 Frequency = 1 [1] 7.10000 6.71000 9.22100 15.87710 21.45821 28.66037 41.08274 55.83522 74.51437 100.78197 If I understand it correctly, the time series, together with initial values, looks like 1,2,3,4,1,2,3,4,5,6,7,8,9,10 The first value is calculated as 1*0.1+2*0.5+3*1+4*0.5+1=7.1, where the first four arguments are initial values times coefficients, and the last argument is the first value of the timeseries, that is 1. But how are the consecutive values calculated? Totally at a loss. Please, help. /Sergey -- I'm not young enough to know everything. /Oscar Wilde Experience is one thing you can't get for nothing. /Oscar Wilde When you are finished changing, you're finished. /Benjamin Franklin Tell me and I forget, teach me and I remember, involve me and I learn. /Benjamin Franklin Luck is where preparation meets opportunity. /George Patten ______________________________________________ R-help@r-project.org mailing list 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.
