Assigning names to values in vector

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Sebastian Daneli
Sebastian Daneli 2019-11-3
评论： Sebastian Daneli 2019-11-4
I would like to keep track on my vectors and need to assign a name to each entry.
For example: xN=[2 1]=[x1 x2], or something like it.
Is it possible to assign the values a handle of some sort? I'm switch the values around, and I don't know beforehand were the going to end up.
So the name should not interfere with the algebraic operations
  2 个评论
Steven Lord
Steven Lord 2019-11-4
I assume this is only one step in a larger project. If you describe that larger project (why are you "switch [sic] the values around"?) we may be able to offer an alternative way to solve the problem, either by doing this tracking or avoiding the need to track.
Sebastian Daneli
Sebastian Daneli 2019-11-4
Basically I am switching bases in a matrix (simplex method), so I need to keep track on the vectors. In the end I must also update the values that I resive

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回答（1 个）

Walter Roberson
Walter Roberson 2019-11-3
No, it is not possible to assign a handle to a value. Use symbolic variable names and subs() as needed. For example,
x = sym('x', [1 5]);
y = sum(x.^(0:4));
xvals = randi([-9 9], 1, 4);
subs(y, x, xvals)
xvals2 = xvals(randperm(length(xvals)));
subs(y, x, xvals2)
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Walter Roberson
Walter Roberson 2019-11-4
Of course there are ways. I already linked you to an explanation of why most of those ways are not good mechanisms to use.
Sebastian Daneli
Sebastian Daneli 2019-11-4
Tried to make sense of what you linked me, but I'm a total noob and can't figure out a solution

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