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From: S. B. Gray on 10 Jun 2010 08:10 How can you create a set of variables: x1 to xn using the Table, or some similar function? I need a large list of variables to use in a linear program and so far have to type them out manually. David One easy was is for example ta = Table[Subscript[q, j], {j, 10}]. This gives you 10 subscripted variables. Then you can do the usual operations such as Subscript[q,5]=7 . Then ta is {Subscript[q, 1], Subscript[q, 2], Subscript[q, 3], Subscript[q, 4], \ 7, Subscript[q, 6], Subscript[q, 7], Subscript[q, 8], Subscript[q, \ 9], Subscript[q, 10]} It is easier to bring up the Basic Math palette and use it to make the subscripts rather than using Subscript[ ].
From: Peter Pein on 13 Jun 2010 04:11 Am Thu, 10 Jun 2010 12:10:50 +0000 (UTC) schrieb "S. B. Gray" <stevebg(a)ROADRUNNER.COM>: > How can you create a set of variables: x1 to xn using the Table, or > some similar function? I need a large list of variables to use in > a linear program and so far have to type them out manually. > > David > > ... something like In[1]:= Table[ToExpression["x"<>ToString[k]],{k,0,10}] Out[1]= {x0,x1,x2,x3,x4,x5,x6,x7,x8,x9,x10} ?
From: Srikanth K S on 16 Jun 2010 05:42
*Dear Steve, Subscript[q, #] & /@ Range[10] Seems simple to me! Further if you wanted to generate a matrix, Table[Subscript[q, i, j], {i, 1, 3}, {j, 1, 4}] gives {{Subscript[q, 1, 1], Subscript[q, 1, 2], Subscript[q, 1, 3], Subscript[q, 1, 4]}, {Subscript[q, 2, 1], Subscript[q, 2, 2], Subscript[q, 2, 3], Subscript[q, 2, 4]}, {Subscript[q, 3, 1], Subscript[q, 3, 2], Subscript[q, 3, 3], Subscript[q, 3, 4]}} *--- 2010/6/10 S. B. Gray <stevebg(a)roadrunner.com> > How can you create a set of variables: x1 to xn using the Table, or some > similar function? I need a large list of variables to use in a linear > program and so far have to type them out manually. > > David > > > One easy was is for example ta == Table[Subscript[q, j], {j, 10}]. > This gives you 10 subscripted variables. Then you can do the usual > operations such as Subscript[q,5]==7 . Then ta is > > {Subscript[q, 1], Subscript[q, 2], Subscript[q, 3], Subscript[q, 4], \ > 7, Subscript[q, 6], Subscript[q, 7], Subscript[q, 8], Subscript[q, \ > 9], Subscript[q, 10]} > > It is easier to bring up the Basic Math palette and use it to make the > subscripts rather than using Subscript[ ]. > > |