Dear all, I am running a quantile estimation with Sparse matrix and when I run the procedure rq.fit.sfn I receive the following warning: tiny diagonals replaced with Inf when calling blkfct. Does anyone knows exactly what does it mean? What's this kind of error? Should I get worried about this message? The matrix I use is a full rank matrix (and indeed I do not have any message about singularity problems). Many thanks for your help alessia
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