domain

Minimum and maximum values of the spline domain in each dimension.

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Discussion

domain(k,:) gives the lower and upper coordinate limits for tensor dimension k:

\[\mathrm{domain}(k,:) = [\tau_{k,1},\ \tau_{k,\mathrm{end}}].\]

So a 2-D spline returns a 2 x 2 array of [min max] pairs, one row for each coordinate direction.