Hi all
I hesitate to declare a <<bug>>, since it's probably something I cannot
find in the help, but the following is very strange ....
The following code always seems to output many vectors "quad" of length 4
each of whose numerical approx "quad.n()" is a vector which only has length
3 ...
########### START CODE ###########
vec = vector([1.0,1.0,1.0,1.0])
ZZ = diagonal_matrix([exp(2*pi*I/4)^ii for ii in range(0,4)])
for ss in range(0,100):
quad = vector([0,0,0,0])
for jj in range(0,4):
indy = round(random()*4.0)
if len(quad.n())==3:
print quad.n(), quad
quad = quad + vec*ZZ^indy
########### END CODE ###########
I believe I have eliminated every non-essential: for example, even though
the loop in the vble "jj" is not explicitly used, it nevertheless seems to
be necessary to produce this weird behaviour, as does some complex number
being in the calcs, and most bizarrely, so is the fact that "indy" be
random! (ie it does not happen if I just fix "indy" to be 0,1,2,3 or 4).
Needless to say, this is rather tricky to work around!
Many thanks in advance for any help.
Best regards
Gary.
--
You received this message because you are subscribed to the Google Groups
"sage-support" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to [email protected].
To post to this group, send email to [email protected].
Visit this group at http://groups.google.com/group/sage-support.
For more options, visit https://groups.google.com/groups/opt_out.
