Displaying 3 results from an estimated 3 matches for "strat1".
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strata
2004 Oct 14
1
Rterm in a Cygwin shell (in Windows) (PR#7287)
This bug report is mostly a note to myself to track this down:
In the version of the Cygwin bash shell I'm currently using, Rterm
does not detect that it is being run interactively, so it switches
into batch mode, and lots of things stop working.
>$ bash --version
>GNU bash, version 2.05b.0(1)-release (i686-pc-cygwin)
>Copyright (C) 2002 Free Software Foundation, Inc.
Duncan
2003 Mar 31
1
nonpos. def. var-cov matrix
...ponse is zero when the covariates are
zero. The purpose of the model was to account
for the the fact that the variances appear to increase linearly with
the fitted values in diagnostic plots. When I use
"intervals(wls.out)"
R1.6.2 yields the message
"Error in intervals.gls(wls7.strat1) : Cannot get confidence
intervals on var-cov components: Non-positive definite approximate
variance-covariance"
Would I be correct in assuming that this means the form of the
weighting function is incorrect? How might I examine the estimated
variance-covariance matrix? Any suggestions w...
2007 Jul 06
0
svyglm
...um ~ q16x + q17ax + q17bx + q17cx + q17dx + q17ex +
q17fx + q18x + q19x + heavy + binge + smoksum + q41sum +
q46 + exsum + q53 + q55 + q61 + ethnicgrp + pcs_sum + mcs_sum,
design = dudleyls1design, family = binomial)
Survey design:
svydesign(id = ~1, probs = ~prob1, strata = ~strat1, fpc = ~pop1,
data = dudleyls1)
Coefficients:
Estimate Std. Error t value
Pr(>|t|)
(Intercept) -0.929963 0.286259 -3.249
0.001170 **
q16xOK 0.433945 0.086506 5.016
5.51e-07 ***
q1...