On Tue, Jan 17, 2017 at 7:26 AM, Tom Clark <tclar...@gmail.com> wrote:
> My students had trouble with plotting cos(x^(1/3)) as a homework problem.
> What's happening is that x^(1/3) generates a primitive complex root so I
> explained that to them, then I found this work around:
>
> def oddroot(x,n):
> sgn(x)*(abs(x))^(1/n)
Slight typo:
def oddroot(x,n):
return sgn(x)*(abs(x))^(1/n)
For example:
https://cloud.sagemath.com/projects/4a5f0542-5873-4eed-a85c-a18c706e8bcd/files/support/2017-01-17-075640-odd-root.sagews
Thanks,
William
>
> This is work for any odd number n and will plot nicely over all of R. I see
> others have had this question on the forum so I thought I'd share.
>
> I don't know if the devs want to implement something like this into SAGE
> more generally, probably not, but at least this is a work around for simple
> graphing etc.
>
> --
> 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 sage-support+unsubscr...@googlegroups.com.
> To post to this group, send email to sage-support@googlegroups.com.
> Visit this group at https://groups.google.com/group/sage-support.
> For more options, visit https://groups.google.com/d/optout.
--
William (http://wstein.org)
--
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 sage-support+unsubscr...@googlegroups.com.
To post to this group, send email to sage-support@googlegroups.com.
Visit this group at https://groups.google.com/group/sage-support.
For more options, visit https://groups.google.com/d/optout.
