[Numpy-discussion] non-linear array manipulation

Gong, Shawn (Contractor) Shawn.Gong@drdc-rddc.gc...
Tue Aug 12 09:37:51 CDT 2008


hi list,

The following array manipulation takes long time because I can't find
ways to do in row/column, and have to do cell by cell.  Would you check
to see if there is a nicer/faster way for this non-linear operation?

for i in range(rows):
  for j in range(columns):
	a[i][j] = math.sqrt( max(0.0, a[i][j]*a[i][j] - b[j]*c[j]) )


thanks,
Shawn



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