If really you do not understand 1) please seek local statistical expertise.
On Wed, 11 May 2005, Smit, R. (Robin) (IenT) wrote:
Dear List members
I am using the regsubsets function to select a few predictor variables using Mallow's Cp:
sel.proc.regsub.full <- regsubsets(CO2 ~ v + log(v) + v.max + sd.v +tad + no.stops.km + av.stop.T + a + sd.a + a.max + d + sd.d + d.max + RPA + P + perc.stop.T + perc.a.T + perc.d.T + RPS + RPSS + sd.P.acc + P.dec + da.acc.1 + RMSACC + RDI + RPSI + P.acc + cov.v + cov.a + cov.d + sd.P + sd.v.run + RCS + T + mass.fin, data = DATASET, weights = count, nbest = 10, nvmax = 35, method = "exhaustive")
I do however encounter the following warning message which I do not understand:
Reordering variables and trying again:Warning messages: 1: 14 linear dependencies found in: leaps.setup(x, y, wt = wt, nbest = nbest, nvmax = nvmax, force.in = force.in, 2: XHAUST returned error code -999 in: leaps.exhaustive(a, really.big
Could anyone please direct me towards the possible problem and its solution?
The DATASET consists of 75 datapoints, 35 numeric predictor variables and the weights vector is given by:
count[1] 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
Many thanks, Robin Smit
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