
Re: problem with append
Posted:
Jan 21, 2013 12:06 AM


> For[a = 2, a < 6, a++, > > For[b = 2, b < 6, b++, > > Appendto[rr = {}, a^b]]] > > rr
One thing wrong is that everytime through the loop, you reset rr to an empty set. The AppendTo statement should read "Appendto[rr, a^b]" with rr assigned to {} before the loop.
This works:
rr = {}; For[a = 2, a < 6, a++, For[b = 2, b < 6, b++, AppendTo[rr, a^b]]]; rr
{4,8,16,32,9,27,81,243,16,64,256,1024,25,125,625,3125} In[9]:= rr = {};
So does this:
rr = {}; For[a = 2, a < 6, a++, For[b = 2, b < 6, b++, rr = Append[rr, a^b]]]; rr
{4,8,16,32,9,27,81,243,16,64,256,1024,25,125,625,3125}

