Hi all,
I am a long-time Maple user and I have some questions to ask.
For my research, I wonder if Mathematica will be more powerful in some aspects.
I have read some documents and know basic computations.
I also know how to write basic functions.
But still have difficulty in the followings:
1 - I want to get all possible lists (sets) of {0,1} given K
Examples like K=3,4,5
Note that the set with all 0s are removed.
2 - How to get "Matrix" in Mathematica? I read that they are like "Tables", but how exactly do I creat them?
I think I can get the "symbolic" matrix, like this:
Module[{ans},
ans = Table[
Subscript[\[Mu], \[Phi]] + Subscript[\[Tau], \[Phi], j] +
Subscript[\[Eta], \[Phi], c], {j, 1, 5}, {c, 1,
3}] /. {Subscript[\[Tau], \[Phi], 1] -> 0,
Subscript[\[Eta], \[Phi], 1] -> 0};
MatrixForm[ans]]
This is fine. But if I have assigned any of the variables, such as Subscript[\, \]=0.4, or any of the variables,
the output would change. I dont want that to happen.
How do I make ALL the variables in the above matrix "local" to the function?
Also, how do I ask Mathematica to get a set (list) of all the varibles in the matrix above?
Like the "indets" function in Maple.
3 - Problem with "MatrixForm"
Does " "MatrixForm" actually term the expression into Matrix?
I would expect the output to give me the entry of 1 row and 1 column, i.e. mu_phi
4 - In Mathematica, is mu_phi a valid "symbol" (variable)?
How do I define it to be a "whole" "symbol" (variable)?
5 - Aside from True,False, how do I get an error message if neither True nor False is given?
In out39, I would expect a error message.
6 - Another form to say "True"
It is possible to have Out45 and Out56 to be the same we have the input "True"?
Thanks!
