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Questions about Mathematica arrays, or implementing array data-type functionality, i.e, collections of regular dimensions containing elements that can be accessed by standard (computable) indices.

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We can surely generalize this (to include scalar multiples, for instance), but here's an implementation that factors the expression written in terms of Dots: dotFactor[expr_] := expr //. { Dot[x__, …
answered Jul 1 '16 by march
3
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One possibility: linearmesh[a_, b_, n_Integer] := {a + (b - a)/(n - 1) #, KroneckerDelta[i, # + 1]} & /@ Range[0, n - 1] The reason that linearmesh[a_, b_, n_Integer] := Array[# &, n, {{a … , KroneckerDelta[i, #1]}, {b, KroneckerDelta[i, #1]}}]; doesn't work is that the third argument to Array can't be a function (and certainly the expressions put in place of # in the first argument don't get also fed to the third argument). …
answered Mar 3 '16 by march