Yes, this was the question. Thanks a lot for detailed explanation.
On 23 February 2014 15:41, Dominique Laurain <[email protected]>wrote: > type() is one very helpful function in SAGE to know about data kinds > > print type(T) > > returns > > <type 'list'> > > > so T is not strictly an "array" but a "list". > your knowledge is mixing with other programming languages where [ and ] > are special characters to get one element of an array. > (some computer men will say to you: it's same, only difference, is list as > no defined maximum number of elements) > > to get first element of this list in SAGE : use T[0] > > print T[0] > > returns > t == 1 > > you can ask: what is it ? answer: simply first element of list: an > "equation" > > next question: how can I get "t" ? answer: get the left hand part of > equation: T[0].left() > > print T[0].left() > > returns > t > > next question: how to assign "x" with "t" ? answer: not assignement of > value but substitution > > x = T[0].left() ; print x > > returns > x > > next question: which value has x ? > > print x > > returns > t > > Argh...I don't want this, but I want x has the same value than t ? answer: > t has NO value, because t == 1, is not an "assignment" but an "equation" > > x = T[0].right() > > print x > > returns > 1 > > OK..now x has value 1, and no relation anymore with t. > > > To be 1 or not to be 1, was it the question ? > > > On Sunday, 23 February 2014 05:39:54 UTC+1, Santanu wrote: >> >> Following code I want to assign a value. >> >> >> var('a,t,x') >> T=[t==1, a==2] >> >> Now I want to make x=t which is 1 in this case. >> That is x will be 1. >> >> >> >> > -- > 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. > -- 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.
