search for: llife

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2013 Oct 17
0
Singular Matrix 'a' in solve
...E. Hansen at http://www.ssc.wisc.edu/~bhansen/progs/ecnmt_00.html. *Then the variable is being transformed to* y <- lag_v(i,0) cf <- lag_v(c,0) lpop <- lag_v(pop,0) linv <- lag_v(inv,0) lgov <- lag_v(gov,0) d1 <- lag_v(d,0) llife <- lag_v(life,0) yt <- tr(y) ct <- tr(cf) y, cf, lpop, linv, lgov, d1, llife each is in “375x1 double matrix” yt and ct each is “300x1 double matrix” (I use R Studio so these characteristics are stated). *The lag_v() and tr() process is as below:* max_la...
2012 Jun 13
2
templated use of aggregate
Dear R-help, I have an xts data set that i have subset by date. now it contains a date-time-stamp, and two columns (price and volume traded): my objective is to create tables of volume traded at a price - and i've been successfully using aggregate to do so in interactive use. say the data looks as follows: px_ym1 vol_ym1 2012-06-01 09:37:00 97.91 437 2012-06-01