What is your L[68] ? This is probably something like a graph without edges...
On Tuesday, May 10, 2016 at 1:53:17 PM UTC+1, Sihuang Hu wrote: > > Thanks for the comments. > I have installed package 'csdp' before. I got this error after I installed > it. > > 在 2016年5月10日星期二 UTC+3下午3:32:59，vdelecroix写道： >> >> The error you get is quite strange. On my computer with sage-7.1 I got >> >> sage: graphs.CycleGraph(7).lovasz_theta() >> Traceback (most recent call last): ur ... >> PackageNotFoundError: the package 'csdp' was not found. You can install >> it by running 'sage -i csdp' in a shell >> >> Which is very explicit about what to do... could you install the csdp >> package and try again? >> >> On 10/05/16 06:58, Sihuang Hu wrote: >> > Hi guys, >> > >> > When I try to compute the lovasz theta number of some graph, it says >> that >> > >> > *ValueError: could not convert string to float: failed.:*G = >> > graphs.CycleGraph(7) >> > V = Set(G.vertices()) >> > L = [] >> > for s in V.subsets(): >> > L.append(G.subgraph(s)) >> > >> > L[68].lovasz_theta() >> > >> --------------------------------------------------------------------------- >> > ValueError Traceback (most recent call >> last) >> > <ipython-input-53-0ad2fb49c2b1> in <module>() >> > ----> 1 L[Integer(68)].lovasz_theta() >> > >> > >> /home/shhu/Documents/SageMath/local/lib/python2.7/site-packages/sage/graphs/lovasz_theta.pyc >> >> >> > in lovasz_theta(graph) >> > 78 tf.close() >> > 79 lines = subprocess.check_output([os.path.join(SAGE_LOCAL, >> > 'bin', 'theta'), tf_name]) >> > ---> 80 return float(lines.split()[-1]) >> > >> > ValueError: could not convert string to float: failed. >> > >> > Thanks in advance! >> > >> > -- 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.
