Yeh, I spoke too soon. Tried a little example and it seemed to work. I don't get a traceback here, but your example doesn't work as expected, either. I get [1,1] as the answer with numpy 1.0rc1. Probably it should be an exception, though.
It seems to work if len(b)<=len(a) and when no indices are repeated in b. --bb On 10/8/06, Daniel Mahler <[EMAIL PROTECTED]> wrote: > Thanks Bill. > Thats what I was hoping for, > but I get > > >>> a > array([0, 0]) > >>> b > array([0, 1, 0, 1, 0]) > >>> c > array([1, 1, 1, 1, 1]) > >>> a[b]+=c > Traceback (most recent call last): > File "<stdin>", line 1, in ? > IndexError: invalid index > > whereas i would like to get > > array([3, 2]) > > > > On 10/8/06, Bill Baxter <[EMAIL PROTECTED]> wrote: > > Yes, that'd be > > a[b] += c > > > > On 10/8/06, Daniel Mahler <[EMAIL PROTECTED]> wrote: > > > Is there a 'loop free' way to do this in Numeric > > > > > > for i in arange(l): > > > a[b[i]]+=c[i] > > > > > > where l == len(b) == len(c) > > > > > > thanks > > > Daniel > > > > ------------------------------------------------------------------------- > > Take Surveys. Earn Cash. Influence the Future of IT > > Join SourceForge.net's Techsay panel and you'll get the chance to share your > > opinions on IT & business topics through brief surveys -- and earn cash > > http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV > > _______________________________________________ > > Numpy-discussion mailing list > > Numpy-discussion@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/numpy-discussion > > > > ------------------------------------------------------------------------- > Take Surveys. Earn Cash. Influence the Future of IT > Join SourceForge.net's Techsay panel and you'll get the chance to share your > opinions on IT & business topics through brief surveys -- and earn cash > http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV > _______________________________________________ > Numpy-discussion mailing list > Numpy-discussion@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/numpy-discussion > ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys -- and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Numpy-discussion mailing list Numpy-discussion@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/numpy-discussion
