ASKSAGE: Sage Q&A Forum - RSS feedhttps://ask.sagemath.org/questions/Q&A Forum for SageenCopyright Sage, 2010. Some rights reserved under creative commons license.Tue, 21 Nov 2017 14:53:11 +0100Rounding entries of a random vectorhttps://ask.sagemath.org/question/39697/rounding-entries-of-a-random-vector/Hello,
I am trying to generate a random diagonal matrix, defined by a random vector over a field RR. The problem is that I need to round all the values to two decimal places, make entries evenly positive and negative (not necessary of equal amount) and, ideally, avoid zeroes.
I have a code
`[round(4*random()-2,2)for i in[1 .. 8]]`
that produces a list of values that I need of size 8. However, I am struggling to combine it with a command `diagonal_matrix` and insert it there.
Also, I don't really understand why do we need to multiply it by 4 in here
`[round(4*random()-2,2)for i in[1 .. 8]]`
and why it produces negative values only, if I multiply it by 2 instead of 4. Could someone explain it please?
Is there any other simpler and more elegant way to solve this problem? Thank you.XeniaTue, 21 Nov 2017 14:53:11 +0100https://ask.sagemath.org/question/39697/