Add sqmatrix-set routine #105
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It is occasionally useful to be able to set/change individual elements of a
sqmatrix: this adds a Scheme routine to do that, one element at a time, i.e. a routine(sqmatrix-set mo i j c), which sets the (i,j)th element of asqmatrixmoto thecnumberc, returning nothing.The present use-case, in case it is of relevance, is to extract submatrices from
dot-eigenvectorcorresponding to overlaps between modes that are not necessarily neighboring; but I've found myself reaching for similar functionality before.