Thanks! Tried it and it is about twice as fast as my approach.
-Ning
On Wed, Jun 3, 2009 at 7:45 PM, wrote:
> On Wed, Jun 3, 2009 at 8:29 PM, Ning Sean wrote:
> > Hi, I want to extract elements of an array (say, a) that are contained in
> > another array (say, b). That
Hi, I want to extract elements of an array (say, a) that are contained in
another array (say, b). That is, if a=array([1,1,2,3,3,4]), b=array([1,4]),
then I want array([1,1,4]).
I did the following but the speed is very slow (maybe because a is very
long):
c=array([])
for x in b:
c=append(c,a[
