Dne 6 Listopad 2014, 12:05, Gavin Flower napsal(a): > On 06/11/14 23:57, Tomas Vondra wrote: >> Dne 6 Listopad 2014, 11:50, Gavin Flower napsal(a): >>> Could you store a 2 dimensional histogram in a one dimensional array: >>> A[z] = value, where z = col * rowSize + row (zero starting index)? >> How would that work for columns with different data types? >> >> Tomas >> > I implicitly assumed that all cells were the same size & type. However, > I could devise a scheme to cope with columns of different types, given > the relevant definitions - but this would obviously be more complicated. > > Also this method can be extended into higher dimensions.
Which is what I did in the "WIP: multivariate stats" ;-) Tomas -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
