Dear David,
I can think of two strategies for dealing with this problem:
>
> Strategy 1: Some code like this:
> if (det(X) < epsilon) {
> warning("Near singular matrix")
> return(NULL)
> }
> return(solve(X))
This solution is probably the easiest one to take, but to match
solve.default, the test should be
if (rcond(X) < .Machine$double.eps)
Catching that case should avoid the error. I hope this helps.
All the best,
Jon
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