Dear all, I use pylab for plotting, which requires creating lists of x and y values. Now, in order to manipulate the lists, I would like to perform simple operations on them, like for example multiply by 2. However, lists seem to behave very differently to vectors when performing mathematical operations on them (see below). Is there an easy way of converting between lists and vectors to use them in mathematical computations without having to loop through all elements? Intuitively, I thought that vector(list) would work to convert a list to a vector, but it does not (see below).
Thanks already for your help, and I'm sorry if I missed this issue in the documentation. Stan ---------------------------------------------------------------------- | SAGE Version 3.1.1, Release Date: 2008-08-17 | | Type notebook() for the GUI, and license() for information. | ---------------------------------------------------------------------- sage: v = vector([1,2,3]); v (1, 2, 3) sage: 2*v (2, 4, 6) sage: w=range(1,4); w [1, 2, 3] sage: 2*w [1, 2, 3, 1, 2, 3] sage: w1=vector(w) --------------------------------------------------------------------------- TypeError Traceback (most recent call last) /Users/sschym/modelling/VegPat/<ipython console> in <module>() /Users/sschym/modelling/VegPat/free_module_element.pyx in sage.modules.free_module_element.vector (sage/modules/ free_module_element.c:2376)() /Users/sschym/modelling/VegPat/free_module_element.pyx in sage.modules.free_module_element.prepare (sage/modules/ free_module_element.c:2622)() TypeError: unable to find a common ring for all elements --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~----------~----~----~----~------~----~------~--~---
