Array tool set

Working on large datasets, I noticed several ways that some common Matlab functions could be expedited, while at the same time generalizing their function. The functions are fairly self-explanatory, being fairly close to the original Matlab functions (detrend, hilbert,norm,normr/normc). An exception is nrank, which does not to my knowledge have a direct analog. nrank ranks data along a particular dimension.

Digging through the Central File Exchange, I see that a nnorm and nnormn have been duplicated in vnorm and unitize, respectively, so I acknowledge their authors Winston Smith and John D'Errico.